Area Code 303 — Denver, Englewood, Aurora, Colorado
ActiveData last updated: March 10, 2026
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9636 | 448 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | 60 |
| LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | 58 |
| T-MOBILE USA, INC. | 6529 | 39 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 35 |
| SPOK, INC. | 6630 | 31 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 31 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CO | 7378 | 28 |
| ONVOY, LLC - CO | 026D | 14 |
| AMERICAN MESSAGING SERVICES, LLC | 9748 | 11 |
Rate Centers
DENVER
FORTLUPTON
DECKERS
LONGMONT
HUDSON
GEORGETOWN
KEENESBURG
STRASBURG
BENNETT
DEER TRAIL
ALLNSPKLYN
BYERS
ROGGEN
Exchange Listings (NXX)
| NPA-NXX | Carrier | Rate Center | Type | LATA | Status |
|---|---|---|---|---|---|
| 303-200 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-201 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-202 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-203 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-204 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-205 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-206 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-207 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-208 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-209 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-210 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-212 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-213 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-214 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-215 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-216 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-217 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-219 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-220 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-221 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-222 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-223 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-224 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-225 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-226 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-227 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-228 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-229 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-230 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-231 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-232 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-233 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-234 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-235 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-236 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-237 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-238 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-239 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-240 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-241 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-242 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-243 | N.E. COLORADO CELLULAR, INC. | DENVER | Wireless | 656 | active |
| 303-244 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-245 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-246 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-247 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-248 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-249 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-250 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-251 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-252 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-253 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-254 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-255 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-256 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-257 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-258 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-259 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-260 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-261 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-262 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-263 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-264 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-265 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-266 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-267 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-268 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-269 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-270 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-271 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-272 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-273 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-274 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-275 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-276 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-277 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-278 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-279 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-280 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-281 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-282 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-283 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-284 | COMCAST IP PHONE, LLC | DENVER | VoIP | 656 | active |
| 303-285 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-286 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-287 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-288 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-289 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-290 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-291 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-292 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-293 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-294 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-295 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-296 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-297 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-298 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-299 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-300 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-301 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-302 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-303 | HD CARRIER LLC | DENVER | VoIP | 656 | active |
| 303-304 | NEW CINGULAR WIRELESS PCS, LLC | FORTLUPTON | Wireless | 656 | active |
| 303-305 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-306 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-307 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-308 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-309 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-310 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-312 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-313 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-314 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-315 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-316 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-317 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-318 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-319 | ELBERT COUNTY WIRELESS, LLC | DENVER | Wireless | 656 | active |
| 303-320 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-321 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-322 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-324 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-325 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-326 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-327 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-328 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-329 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-330 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-331 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-332 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-333 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-334 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-335 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-336 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-337 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-338 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-339 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-340 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-341 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-342 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-343 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-344 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-345 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-346 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-347 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-348 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-349 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-350 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-351 | ONVOY, LLC - CO | DECKERS | Landline | 656 | active |
| 303-352 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-353 | COMCAST IP PHONE, LLC | DENVER | VoIP | 656 | active |
| 303-354 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | Landline | 656 | active |
| 303-355 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-356 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-357 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-358 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-359 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-360 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-361 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-362 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-363 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-364 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-365 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-366 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-367 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-368 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-369 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-370 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-371 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-372 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-373 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-374 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-375 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-376 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-377 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-378 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-379 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-380 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-381 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-382 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-383 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-384 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-385 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-386 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-387 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-388 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-389 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-390 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-391 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-392 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-393 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-394 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-395 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-396 | LIVE WIRE NETWORKS, INC. - CO | DENVER | VoIP | 656 | active |
| 303-397 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-398 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-399 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-400 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-401 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-402 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-403 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-404 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-405 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-406 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-407 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-408 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-409 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-410 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-412 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-413 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-414 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-415 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-416 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-417 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-418 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-419 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-420 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-421 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-422 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-423 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-424 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-425 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-426 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-427 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-428 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-429 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-430 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-431 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-432 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-433 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-434 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-435 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-436 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-437 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-438 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-439 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-440 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-441 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-442 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-443 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-444 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-445 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-446 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-447 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-448 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-449 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-450 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-451 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-452 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-453 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-454 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-455 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-456 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-457 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-458 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-459 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-460 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-461 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-462 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-463 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-464 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-465 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-466 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-467 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-468 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-469 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-470 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-471 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-472 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-473 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-474 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-475 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-476 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-477 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-478 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-479 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-480 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-481 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-482 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-483 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-484 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-485 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-486 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-487 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-488 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-489 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-490 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-491 | ONVOY SPECTRUM, LLC | DENVER | Wireless | 656 | active |
| 303-492 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-493 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-494 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-495 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-496 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-497 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-498 | COMCAST IP PHONE, LLC | DENVER | VoIP | 656 | active |
| 303-499 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-500 | LEVEL 3 COMMUNICATIONS, LLC - CO | HUDSON | Landline | 656 | active |
| 303-501 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-502 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | FORTLUPTON | Wireless | 656 | active |
| 303-503 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-504 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-505 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-506 | NEW CINGULAR WIRELESS PCS, LLC | FORTLUPTON | Wireless | 656 | active |
| 303-507 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-508 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-509 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-510 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-512 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-513 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-514 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-515 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-516 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-517 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-518 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-519 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-520 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-521 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-522 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-523 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-524 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-525 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-526 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-527 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-528 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-529 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-530 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-531 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-532 | PAETEC ITEL, LLC | LONGMONT | VoIP | 656 | active |
| 303-533 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-534 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-535 | ONVOY, LLC - CO | FORTLUPTON | Landline | 656 | active |
| 303-536 | QWEST CORPORATION | HUDSON | Landline | 656 | active |
| 303-537 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-538 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-539 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-540 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-541 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-542 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-543 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-544 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-545 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-546 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-547 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-548 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-549 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-550 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-551 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-552 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-553 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-554 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-556 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-557 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-558 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-559 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-560 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-561 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-562 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-563 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-564 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-565 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-566 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-567 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-568 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-569 | QWEST CORPORATION | GEORGETOWN | Landline | 656 | active |
| 303-570 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-571 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-572 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-573 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-574 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-575 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-576 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-577 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | DENVER | Landline | 656 | active |
| 303-578 | LEVEL 3 COMMUNICATIONS, LLC - CO | KEENESBURG | Landline | 656 | active |
| 303-579 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-580 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-581 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-582 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-583 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-584 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-585 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-586 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-587 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-588 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-589 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-590 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-591 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-592 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-593 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-594 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-595 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-596 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-597 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | DENVER | Landline | 656 | active |
| 303-598 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-599 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-600 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-601 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-602 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-603 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-604 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-605 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-606 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-607 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-608 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-609 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-610 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-612 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-613 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-614 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-615 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-616 | ONVOY SPECTRUM, LLC | KEENESBURG | Wireless | 656 | active |
| 303-617 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-618 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-619 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-620 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-621 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-622 | STRASBURG TEL. CO. | STRASBURG | Landline | 656 | active |
| 303-623 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-624 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-625 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-626 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-627 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-628 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-629 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-630 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-632 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-633 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-634 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-635 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-636 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-637 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-638 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-639 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-640 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-641 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-642 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-643 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-644 | EASTERN SLOPE RURAL TEL. ASSN., INC. | BENNETT | Landline | 656 | active |
| 303-645 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-646 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-647 | QWEST CORPORATION | DECKERS | Landline | 656 | active |
| 303-648 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-649 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-650 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-651 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-652 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-653 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-654 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-655 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-656 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-657 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-658 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-659 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-660 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-661 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-662 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-663 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-664 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-665 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-666 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-667 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-668 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-669 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-670 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-671 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-672 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-673 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-674 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-675 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-676 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-677 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-678 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-679 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-680 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-681 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-682 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-683 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-684 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-685 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-686 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-687 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-688 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-689 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-690 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-691 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-692 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-693 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-694 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-695 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-696 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-697 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-698 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-699 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-701 | COMMUNICATIONS UNLIMITED | DENVER | Landline | 656 | active |
| 303-702 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-703 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-704 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-705 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-706 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-707 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-708 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-709 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | LONGMONT | Wireless | 656 | active |
| 303-710 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | FORTLUPTON | Wireless | 656 | active |
| 303-712 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-713 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-714 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-715 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-716 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-717 | NEW CINGULAR WIRELESS PCS, LLC | FORTLUPTON | Wireless | 656 | active |
| 303-718 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | FORTLUPTON | Wireless | 656 | active |
| 303-719 | LEVEL 3 COMMUNICATIONS, LLC - CO | DEER TRAIL | Landline | 656 | active |
| 303-720 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | FORTLUPTON | Wireless | 656 | active |
| 303-721 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-722 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-723 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-724 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-725 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-726 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-727 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-728 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-729 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-730 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-731 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-732 | QWEST CORPORATION | KEENESBURG | Landline | 656 | active |
| 303-733 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-734 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-735 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-736 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-737 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-738 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-739 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-740 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-741 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-742 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-743 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-744 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-745 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-746 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | LONGMONT | Wireless | 656 | active |
| 303-747 | QWEST CORPORATION | ALLNSPKLYN | Landline | 656 | active |
| 303-748 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-749 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-750 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-751 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-752 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-753 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-754 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-755 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-756 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-757 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-758 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-759 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-760 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-761 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-762 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-763 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-764 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-765 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-766 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-767 | AMERICAN MESSAGING SERVICES, LLC | DENVER | Landline | 656 | active |
| 303-768 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-769 | BIJOU TEL. COOP. ASSN., INC. | DEER TRAIL | Landline | 656 | active |
| 303-770 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-771 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-772 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-773 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-774 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-775 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | LONGMONT | Wireless | 656 | active |
| 303-776 | QWEST CORPORATION | LONGMONT | Landline | 656 | active |
| 303-777 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-778 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-779 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-780 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-781 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-782 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-783 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-784 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-785 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-786 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-787 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-788 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-789 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-790 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-791 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-792 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-793 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-794 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-795 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-796 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-797 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-798 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-799 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-800 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-801 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-802 | LEVEL 3 TELECOM OF COLORADO, LLC - CO | DENVER | Landline | 656 | active |
| 303-803 | LEVEL 3 TELECOM OF COLORADO, LLC - CO | DENVER | Landline | 656 | active |
| 303-804 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-805 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-806 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-807 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-808 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-809 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-810 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-812 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-813 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-814 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-815 | INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO | DENVER | Landline | 656 | active |
| 303-816 | QWEST CORPORATION | DECKERS | Landline | 656 | active |
| 303-817 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-818 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-819 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-820 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-821 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-822 | BIJOU TEL. COOP. ASSN., INC. | BYERS | Landline | 656 | active |
| 303-823 | QWEST CORPORATION | ALLNSPKLYN | Landline | 656 | active |
| 303-824 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-825 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-826 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-827 | LEVEL 3 COMMUNICATIONS, LLC - CO | LONGMONT | Landline | 656 | active |
| 303-828 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-829 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-830 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-831 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-832 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-833 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-834 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | LONGMONT | Wireless | 656 | active |
| 303-835 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-836 | COMMUNICATIONS UNLIMITED | DENVER | Landline | 656 | active |
| 303-837 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-838 | QWEST CORPORATION | DECKERS | Landline | 656 | active |
| 303-839 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-840 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-841 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-842 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-843 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-844 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-845 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | LONGMONT | VoIP | 656 | active |
| 303-846 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-847 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-848 | LEVEL 3 COMMUNICATIONS, LLC - CO | LONGMONT | Landline | 656 | active |
| 303-849 | ROGGEN TEL. COOP. CO. | ROGGEN | Landline | 656 | active |
| 303-850 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-851 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-852 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-853 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-854 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-855 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-856 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-857 | QWEST CORPORATION | FORTLUPTON | Landline | 656 | active |
| 303-858 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-859 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-860 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-861 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-862 | COMCAST IP PHONE, LLC | DENVER | VoIP | 656 | active |
| 303-863 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-864 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-865 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-866 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-867 | ILOKA, INC. DBA NEWCLOUD NETWORKS - CO | DENVER | Landline | 656 | active |
| 303-868 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-869 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-870 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-871 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-872 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-873 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-874 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-875 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-876 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-877 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-878 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-879 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-880 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-881 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-882 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-883 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-884 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-885 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-886 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-887 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-888 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-889 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-890 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-891 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-892 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-893 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-894 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-895 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-896 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-897 | SPOK, INC. | DENVER | Landline | 656 | active |
| 303-898 | NEW CINGULAR WIRELESS PCS, LLC | DENVER | Wireless | 656 | active |
| 303-899 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-900 | LEVEL 3 COMMUNICATIONS, LLC - CO | GEORGETOWN | Landline | 656 | active |
| 303-901 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-902 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-903 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-904 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-905 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-906 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-907 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-908 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-909 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-910 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-912 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-913 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-914 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-915 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-916 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-917 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-918 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-919 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-920 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-921 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-922 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-923 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-924 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-925 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-926 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-927 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-928 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-929 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-930 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-931 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-932 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-933 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-934 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-935 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-936 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-937 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-938 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-939 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-940 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-941 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-942 | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | DENVER | VoIP | 656 | active |
| 303-943 | SKYE TELECOM LLC DBA SKYETEL | DENVER | VoIP | 656 | active |
| 303-944 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-945 | COMCAST IP PHONE, LLC | DENVER | VoIP | 656 | active |
| 303-946 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-947 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-948 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-949 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-951 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-952 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-953 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-954 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-955 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-956 | NEW CINGULAR WIRELESS PCS, LLC | FORTLUPTON | Wireless | 656 | active |
| 303-957 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-960 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-961 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-962 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-963 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-964 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-965 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-966 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-967 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-968 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-969 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-970 | ONVOY, LLC - CO | DECKERS | Landline | 656 | active |
| 303-971 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-972 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-973 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-974 | LEVEL 3 COMMUNICATIONS, LLC - CO | DENVER | Landline | 656 | active |
| 303-975 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-977 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-978 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-979 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-980 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-981 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | DENVER | Wireless | 656 | active |
| 303-982 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-984 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-985 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-986 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-987 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-988 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-989 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-990 | T-MOBILE USA, INC. | FORTLUPTON | Wireless | 656 | active |
| 303-991 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | DENVER | Landline | 656 | active |
| 303-992 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-993 | ONVOY, LLC - CO | DENVER | Landline | 656 | active |
| 303-994 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-995 | T-MOBILE USA, INC. | DENVER | Wireless | 656 | active |
| 303-996 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | DENVER | Landline | 656 | active |
| 303-997 | COMCAST IP PHONE, LLC | DENVER | VoIP | 656 | active |
| 303-998 | QWEST CORPORATION | DENVER | Landline | 656 | active |
| 303-999 | COMCAST IP PHONE, LLC | DENVER | VoIP | 656 | active |
Related Area Codes
Area code 303 shares its geographic region with the following overlay area codes: