Area Code 312 — Chicago, Elgin, Burr Ridge, Illinois
ActiveData last updated: June 25, 2026
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS BELL TEL CO | 9329 | 334 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 82 |
| T-MOBILE USA, INC. | 6529 | 60 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | 54 |
| SPOK, INC. | 6630 | 34 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 33 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 32 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 22 |
| ONVOY, LLC | 224C | 20 |
| AMERICAN MESSAGING SERVICES, LLC | 9748 | 14 |
Rate Centers
Exchange Listings (NXX)
| NPA-NXX | Carrier | Rate Center | Type | LATA | Status |
|---|---|---|---|---|---|
| 312-200 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-201 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-202 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-203 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-204 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-205 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-206 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-207 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-208 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-209 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | NORTHBROOK | Wireless | 358 | active |
| 312-210 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-212 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-213 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-214 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-215 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-216 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-217 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-218 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-219 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-220 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-221 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-222 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-223 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-224 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-225 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-226 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-227 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-228 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-229 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-230 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-231 | NEW CINGULAR WIRELESS PCS, LLC - IL | ROSELLE | Wireless | 358 | active |
| 312-232 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-233 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-234 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-235 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-236 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-237 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-238 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-239 | AT&T - LOCAL | CHICGOZN01 | Landline | 358 | active |
| 312-240 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-241 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-242 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-243 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-244 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-245 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-246 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-247 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-248 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-249 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-250 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-251 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-252 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-253 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-254 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-255 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-256 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-257 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-258 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-259 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-260 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-261 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-263 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-264 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-265 | ACCESS ONE, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-266 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-267 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-268 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-269 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-270 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-271 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-272 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-273 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-274 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-275 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-276 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-277 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-278 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-280 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-281 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-282 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-283 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-284 | XO ILLINOIS, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-285 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-286 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-287 | T-MOBILE USA, INC. | CHICGOZN07 | Wireless | 358 | active |
| 312-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-289 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-290 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-291 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-292 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-293 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-294 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-295 | SPOK, INC. | LA GRANGE | Landline | 358 | active |
| 312-296 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-297 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-298 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-299 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-300 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-301 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-302 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-303 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-304 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-305 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | NORTHBROOK | Wireless | 358 | active |
| 312-306 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-307 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-308 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-309 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-310 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | NORTHBROOK | Wireless | 358 | active |
| 312-312 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-313 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-314 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-315 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-316 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-317 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-318 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | LA GRANGE | Wireless | 358 | active |
| 312-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-320 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-321 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-322 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-323 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-324 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-325 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-326 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-327 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-328 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-329 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-330 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-331 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-332 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-333 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-334 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-335 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-336 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-337 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-338 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-339 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-340 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-341 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-342 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-343 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-344 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-345 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-346 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-347 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-348 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-349 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-350 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-351 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-352 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-353 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-354 | NEW CINGULAR WIRELESS PCS, LLC - IL | ROSELLE | Wireless | 358 | active |
| 312-355 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-356 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-357 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-358 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-359 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-360 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-361 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-362 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-363 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-364 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-365 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-366 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-367 | SPOK, INC. | LA GRANGE | Landline | 358 | active |
| 312-368 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-369 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-370 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-371 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-372 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-373 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-374 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-375 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-376 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-377 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-378 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-379 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-380 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-381 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-382 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-383 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-384 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-385 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-386 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-387 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-388 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-389 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-390 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-391 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-392 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-393 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-394 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-395 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-396 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-397 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-398 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-399 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-400 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-401 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-402 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-403 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | LA GRANGE | Wireless | 358 | active |
| 312-404 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-405 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-406 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-407 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-408 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-409 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-410 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-412 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-413 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-414 | VONAGE AMERICA LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-415 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-416 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-417 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-418 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-419 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-420 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-421 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-422 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-423 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-424 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-425 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-426 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-427 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-428 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-429 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-430 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-431 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-432 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-433 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-434 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-435 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-436 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-437 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-438 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-439 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-440 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-441 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-442 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-443 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-444 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-445 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-446 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-447 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-448 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-449 | WAVENATION, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-450 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-451 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-452 | ONVOY SPECTRUM, LLC | CHICGOZN01 | Wireless | 358 | active |
| 312-453 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-454 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-455 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-456 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-457 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-458 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-459 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-460 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-461 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-462 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-463 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-464 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-465 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-466 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-467 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-468 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-469 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-470 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-471 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-472 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-473 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-474 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-475 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-476 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-477 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-478 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-479 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-480 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-481 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-482 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-483 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-484 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-485 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-487 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-488 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-489 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-490 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-491 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-492 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-493 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-494 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-495 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-496 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-497 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-498 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-499 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-500 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-501 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | LA GRANGE | Wireless | 358 | active |
| 312-502 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-503 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-504 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-505 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-506 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-507 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-508 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-509 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-510 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-512 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-513 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-514 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-515 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-516 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-517 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-518 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-519 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-520 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-521 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-522 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-523 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-524 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-525 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-526 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-527 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-528 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-529 | AT&T - LOCAL | CHICGOZN01 | Landline | 358 | active |
| 312-530 | STRATUS NETWORKS | CHICGOZN01 | VoIP | 358 | active |
| 312-531 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-532 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-533 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-534 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-535 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-536 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-537 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-538 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-539 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-540 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-541 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-542 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-543 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-544 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-545 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-546 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-547 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-548 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-549 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-550 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-551 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-552 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-553 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-554 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-556 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-557 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-558 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-559 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-560 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-561 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-562 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-563 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-564 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-565 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-566 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-567 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-568 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-569 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-570 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-571 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-572 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-573 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-574 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-575 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-576 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-577 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-578 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-579 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-580 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-581 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-582 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-583 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-584 | VOIP INNOVATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-585 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-586 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-587 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-588 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-589 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-590 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-591 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-592 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-593 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-594 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-595 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-596 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-597 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-598 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-599 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-600 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-601 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-602 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-603 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-604 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-605 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-606 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-607 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-608 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-609 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-610 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-612 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-613 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-614 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-615 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-616 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-617 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-618 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-619 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-620 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-621 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-622 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-623 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-624 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-625 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-626 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-627 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-628 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-629 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-630 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-631 | CENTURYLINK COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-632 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-633 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-634 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-635 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-636 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-637 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-638 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-639 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-640 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-641 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-642 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-643 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-644 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-645 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-646 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-647 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-648 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-649 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-650 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-651 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-652 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-653 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-654 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-655 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-656 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-657 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-658 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-659 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-660 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-661 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-662 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-663 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-664 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-665 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-666 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-667 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-668 | CSC WIRELESS, LLC | CHICGOZN01 | Wireless | 358 | active |
| 312-669 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-670 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-671 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-672 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-673 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-674 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-675 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-676 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-677 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-678 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-679 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | CHICGOZN01 | Landline | active | |
| 312-680 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-681 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-682 | NUSO, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-683 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-684 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-685 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-686 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-687 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-688 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-689 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-690 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-691 | INDIANA PAGING NETWORK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-692 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-693 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-694 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-695 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-696 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-697 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-698 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-699 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-701 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-702 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-703 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-704 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-705 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-706 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-707 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-708 | ONVOY SPECTRUM, LLC | CHICGOZN01 | Wireless | 358 | active |
| 312-709 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-710 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-712 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-713 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-714 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-715 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-716 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-717 | SPOK, INC. | LA GRANGE | Landline | 358 | active |
| 312-718 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-719 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-720 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-721 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-722 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-723 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-724 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-725 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-726 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-727 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-728 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-729 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-730 | AT&T - LOCAL | CHICGOZN01 | Landline | 358 | active |
| 312-731 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-732 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-733 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-734 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-735 | T-MOBILE USA, INC. | CHICGOZN04 | Wireless | 358 | active |
| 312-736 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-737 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-738 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-739 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-740 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-741 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-742 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-743 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-744 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-745 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-746 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-747 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-748 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-749 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-750 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-751 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-752 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-753 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-754 | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-755 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-756 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-757 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-758 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-759 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-760 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-761 | TELENGY LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-762 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-763 | COMCAST IP PHONE, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-764 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-765 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-766 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-767 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-768 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-769 | INDIANA PAGING NETWORK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-770 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-771 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-772 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-773 | ONVOY SPECTRUM, LLC | CHICGOZN01 | Wireless | 358 | active |
| 312-774 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-775 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-776 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-777 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-778 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-779 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-780 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-781 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-782 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-783 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-784 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-785 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-786 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-787 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-788 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-789 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-790 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-791 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-792 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-793 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-794 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-795 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-796 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-797 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-798 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-799 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-800 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-801 | NUSO, LLC | CHICGOZN01 | Wireless | 358 | active |
| 312-802 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-803 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-804 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-805 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-806 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-807 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-808 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-809 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-810 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-812 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-813 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-814 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-815 | AIRESPRING, INC. | CHICGOZN01 | VoIP | 358 | active |
| 312-816 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-817 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-818 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-819 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-820 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-821 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-822 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-823 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-824 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-825 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-826 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-827 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-828 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-829 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-830 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-831 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-832 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-833 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-834 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-835 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-836 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-837 | COMCAST IP PHONE, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-838 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-839 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-840 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-841 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-842 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-843 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-844 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-845 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-846 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-847 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-848 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-849 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-850 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-851 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-852 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-853 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-854 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-855 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-856 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-857 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-858 | RCLEC, INC. | CHICGOZN01 | VoIP | 358 | active |
| 312-859 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-860 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-861 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-862 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-863 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-864 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-865 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-866 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-867 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-868 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-869 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-870 | FIRST COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-871 | T-MOBILE USA, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-872 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-873 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-874 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-875 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-876 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-877 | AT&T ENTERPRISES, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-878 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-879 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-880 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-881 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-882 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-883 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-884 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-885 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-886 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-887 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-888 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-889 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-890 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-891 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-892 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-893 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-894 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-895 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-896 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-897 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-898 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-899 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-900 | FRACTEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-901 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-902 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-903 | AMERICAN MESSAGING SERVICES, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-904 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-905 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-906 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-907 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-908 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-909 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-910 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-912 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-913 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-914 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-915 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-916 | Landline | active | |||
| 312-917 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-918 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-919 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-920 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-921 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-922 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-923 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-924 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-925 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-926 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-927 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-928 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-929 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-930 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-931 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-932 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-933 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-934 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-935 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-936 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-937 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-938 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-939 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-940 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-941 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-942 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-943 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-944 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-945 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-946 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-947 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-948 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-949 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-951 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-952 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-953 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-954 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-955 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHICGOZN01 | Landline | 358 | active |
| 312-956 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-957 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-960 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-961 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-962 | LEVEL 3 COMMUNICATIONS, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-963 | SPOK, INC. | CHICGOZN01 | Landline | 358 | active |
| 312-964 | ONVOY, LLC | CHICGOZN01 | Landline | 358 | active |
| 312-965 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-966 | METROPCS, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-967 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-968 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | LA GRANGE | Wireless | 358 | active |
| 312-969 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | LA GRANGE | Wireless | 358 | active |
| 312-970 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-971 | BANDWIDTH.COM CLEC, LLC - IL | CHICGOZN01 | VoIP | 358 | active |
| 312-972 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-973 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
| 312-974 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-975 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-977 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-978 | T-MOBILE USA, INC. | CHICGOZN01 | Wireless | 358 | active |
| 312-979 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-980 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-981 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-982 | COMCAST IP PHONE, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-983 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-984 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-985 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-986 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-987 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-988 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-989 | NEW CINGULAR WIRELESS PCS, LLC - IL | CHICGOZN01 | Wireless | 358 | active |
| 312-990 | NEW CINGULAR WIRELESS PCS, LLC - IL | HINSDALE | Wireless | 358 | active |
| 312-991 | NEW CINGULAR WIRELESS PCS, LLC - IL | WHEELING | Wireless | 358 | active |
| 312-992 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-993 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-994 | PAETEC ITEL, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-995 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | CHICGOZN01 | Landline | 358 | active |
| 312-996 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-997 | ILLINOIS BELL TEL CO | CHICGOZN01 | Landline | 358 | active |
| 312-998 | CENTURYLINK COMMUNICATIONS, LLC | CHICGOZN01 | VoIP | 358 | active |
| 312-999 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CHICGOZN01 | Landline | 358 | active |
Related Area Codes
Area code 312 shares its geographic region with the following overlay area codes: