Reference Data
Area Code Directory
Area Code 303 — Denver, Englewood, Aurora, Colorado

Area Code 303 — Denver, Englewood, Aurora, Colorado

Active

Data last updated: March 10, 2026

State
Colorado
Country
US
Timezone
America/Denver
Assigned
April 12, 2001
Exchanges (NXX)
784
Carriers
27
Rate Centers
13
Overlay
Yes — 720, 983

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
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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

Area code 303 shares its geographic region with the following overlay area codes:

720 983