Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
DENVER prefixes in area code 303
NANPA records 735 assigned NXX blocks to rate center DENVER in area code 303, 93.8% of the 784 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 22 holders hold those blocks, the largest being QWEST CORPORATION (429), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (52), LEVEL 3 COMMUNICATIONS, LLC - CO (52). The earliest assignment on record here is 2001-04-12 and the most recent 2025-01-16. 196 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 223, 319, 660, 704 – overlay codes cover the same geography, so a rate center is served by all of them.
735 assigned blocks – 93.8% of 303
22 holders of record
196 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 303-200 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-201 | Spok SPOK, INC. | – | no | yes |
| 303-202 | Lumen QWEST CORPORATION | – | no | yes |
| 303-203 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-204 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-205 | Lumen QWEST CORPORATION | – | no | yes |
| 303-206 | Spok SPOK, INC. | – | no | yes |
| 303-207 | Spok SPOK, INC. | – | no | yes |
| 303-208 | Spok SPOK, INC. | – | no | yes |
| 303-209 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-210 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-212 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-213 | Spok SPOK, INC. | – | no | yes |
| 303-214 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-215 | Lumen QWEST CORPORATION | – | no | yes |
| 303-216 | Lumen QWEST CORPORATION | – | no | yes |
| 303-217 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-218 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-219 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-220 | Lumen QWEST CORPORATION | – | no | yes |
| 303-221 | Lumen QWEST CORPORATION | – | no | yes |
| 303-222 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-223 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-224 | Lumen QWEST CORPORATION | – | no | yes |
| 303-225 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-226 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-227 | Lumen QWEST CORPORATION | – | no | yes |
| 303-228 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-229 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-230 | Spok SPOK, INC. | – | no | yes |
| 303-231 | Lumen QWEST CORPORATION | – | no | yes |
| 303-232 | Lumen QWEST CORPORATION | – | no | yes |
| 303-233 | Lumen QWEST CORPORATION | – | no | yes |
| 303-234 | Lumen QWEST CORPORATION | – | no | yes |
| 303-235 | Lumen QWEST CORPORATION | – | no | yes |
| 303-236 | Lumen QWEST CORPORATION | – | no | yes |
| 303-237 | Lumen QWEST CORPORATION | – | no | yes |
| 303-238 | Lumen QWEST CORPORATION | – | no | yes |
| 303-239 | Lumen QWEST CORPORATION | – | no | yes |
| 303-240 | Spok SPOK, INC. | – | no | yes |
| 303-241 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-242 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-243 | N.E. COLORADO CELLULAR, INC. | – | yes | yes |
| 303-244 | Lumen QWEST CORPORATION | – | no | yes |
| 303-245 | Lumen QWEST CORPORATION | – | no | yes |
| 303-246 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-247 | Lumen QWEST CORPORATION | – | no | yes |
| 303-248 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-249 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-250 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-251 | Spok SPOK, INC. | – | no | yes |
| 303-252 | Lumen QWEST CORPORATION | – | no | yes |
| 303-253 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-254 | Lumen QWEST CORPORATION | – | no | yes |
| 303-255 | Lumen QWEST CORPORATION | – | no | yes |
| 303-256 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | no | yes |
| 303-257 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-258 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-259 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-260 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-261 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-262 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | no | yes |
| 303-263 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-264 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-265 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-266 | Spok SPOK, INC. | – | no | yes |
| 303-267 | Lumen QWEST CORPORATION | – | no | yes |
| 303-268 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-269 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-270 | Lumen QWEST CORPORATION | – | no | yes |
| 303-271 | Lumen QWEST CORPORATION | – | no | yes |
| 303-272 | Lumen QWEST CORPORATION | – | no | yes |
| 303-273 | Lumen QWEST CORPORATION | – | no | yes |
| 303-274 | Lumen QWEST CORPORATION | – | no | yes |
| 303-275 | Lumen QWEST CORPORATION | – | no | yes |
| 303-276 | Onvoy ONVOY, LLC - CO | 2021-08-19 | yes | yes |
| 303-277 | Lumen QWEST CORPORATION | – | no | yes |
| 303-278 | Lumen QWEST CORPORATION | – | no | yes |
| 303-279 | Lumen QWEST CORPORATION | – | no | yes |
| 303-280 | Lumen QWEST CORPORATION | – | no | yes |
| 303-281 | Lumen QWEST CORPORATION | – | no | yes |
| 303-282 | Lumen QWEST CORPORATION | – | no | yes |
| 303-283 | Lumen QWEST CORPORATION | – | no | yes |
| 303-284 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 303-285 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-286 | Lumen QWEST CORPORATION | – | no | yes |
| 303-287 | Lumen QWEST CORPORATION | – | no | yes |
| 303-288 | Lumen QWEST CORPORATION | – | no | yes |
| 303-289 | Lumen QWEST CORPORATION | – | no | yes |
| 303-290 | Lumen QWEST CORPORATION | – | no | yes |
| 303-291 | Lumen QWEST CORPORATION | – | no | yes |
| 303-292 | Lumen QWEST CORPORATION | – | no | yes |
| 303-293 | Lumen QWEST CORPORATION | – | no | yes |
| 303-294 | Lumen QWEST CORPORATION | – | no | yes |
| 303-295 | Lumen QWEST CORPORATION | – | no | yes |
| 303-296 | Lumen QWEST CORPORATION | – | no | yes |
| 303-297 | Lumen QWEST CORPORATION | – | no | yes |
| 303-298 | Lumen QWEST CORPORATION | – | no | yes |
| 303-299 | Lumen QWEST CORPORATION | – | no | yes |
| 303-300 | Lumen QWEST CORPORATION | – | no | yes |
| 303-301 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-302 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-303 | HD CARRIER LLC | 2024-08-26 | yes | yes |
| 303-305 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-306 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-307 | Lumen QWEST CORPORATION | – | no | yes |
| 303-308 | Lumen QWEST CORPORATION | – | no | yes |
| 303-309 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-310 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-312 | Lumen QWEST CORPORATION | – | no | yes |
| 303-313 | Lumen QWEST CORPORATION | – | no | yes |
| 303-314 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-315 | Lumen QWEST CORPORATION | – | no | yes |
| 303-316 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-317 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-318 | Lumen QWEST CORPORATION | – | no | yes |
| 303-319 | ELBERT COUNTY WIRELESS, LLC | 2004-08-12 | yes | yes |
| 303-320 | Lumen QWEST CORPORATION | – | no | yes |
| 303-321 | Lumen QWEST CORPORATION | – | no | yes |
| 303-322 | Lumen QWEST CORPORATION | – | no | yes |
| 303-323 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-324 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-325 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-326 | Lumen QWEST CORPORATION | – | no | yes |
| 303-327 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-328 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-329 | Lumen QWEST CORPORATION | – | no | yes |
| 303-330 | Onvoy ONVOY, LLC - CO | 2006-03-09 | yes | yes |
| 303-331 | Lumen QWEST CORPORATION | – | no | yes |
| 303-332 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-333 | Lumen QWEST CORPORATION | – | no | yes |
| 303-334 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-335 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | yes | yes |
| 303-336 | Lumen QWEST CORPORATION | – | no | yes |
| 303-337 | Lumen QWEST CORPORATION | – | no | yes |
| 303-338 | Lumen QWEST CORPORATION | – | no | yes |
| 303-339 | Onvoy ONVOY, LLC - CO | – | yes | yes |
| 303-340 | Lumen QWEST CORPORATION | – | no | yes |
| 303-341 | Lumen QWEST CORPORATION | – | no | yes |
| 303-342 | Lumen QWEST CORPORATION | – | no | yes |
| 303-343 | Lumen QWEST CORPORATION | – | no | yes |
| 303-344 | Lumen QWEST CORPORATION | – | no | yes |
| 303-345 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-346 | Lumen QWEST CORPORATION | – | no | yes |
| 303-347 | Lumen QWEST CORPORATION | – | no | yes |
| 303-348 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-349 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-350 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 303-352 | Lumen QWEST CORPORATION | – | no | yes |
| 303-353 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 303-354 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-355 | Lumen QWEST CORPORATION | – | no | yes |
| 303-356 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-357 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-358 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-359 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-360 | Lumen QWEST CORPORATION | – | no | yes |
| 303-361 | Lumen QWEST CORPORATION | – | no | yes |
| 303-362 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-363 | Lumen QWEST CORPORATION | – | no | yes |
| 303-364 | Lumen QWEST CORPORATION | – | no | yes |
| 303-365 | Lumen QWEST CORPORATION | – | no | yes |
| 303-366 | Lumen QWEST CORPORATION | – | no | yes |
| 303-367 | Lumen QWEST CORPORATION | – | no | yes |
| 303-368 | Lumen QWEST CORPORATION | – | no | yes |
| 303-369 | Lumen QWEST CORPORATION | – | no | yes |
| 303-370 | Lumen QWEST CORPORATION | – | no | yes |
| 303-371 | Lumen QWEST CORPORATION | – | no | yes |
| 303-372 | Lumen QWEST CORPORATION | – | no | yes |
| 303-373 | Lumen QWEST CORPORATION | – | no | yes |
| 303-374 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-375 | Lumen QWEST CORPORATION | – | no | yes |
| 303-376 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-377 | Lumen QWEST CORPORATION | – | no | yes |
| 303-378 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-379 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-380 | Lumen QWEST CORPORATION | – | no | yes |
| 303-381 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-382 | Lumen QWEST CORPORATION | – | no | yes |
| 303-383 | Lumen QWEST CORPORATION | – | no | yes |
| 303-384 | Lumen QWEST CORPORATION | – | no | yes |
| 303-385 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-386 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-387 | Lumen QWEST CORPORATION | – | no | yes |
| 303-388 | Lumen QWEST CORPORATION | – | no | yes |
| 303-389 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-390 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-391 | Lumen QWEST CORPORATION | – | no | yes |
| 303-392 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 2025-01-16 | yes | yes |
| 303-393 | Lumen QWEST CORPORATION | – | no | yes |
| 303-394 | Lumen QWEST CORPORATION | – | no | yes |
| 303-395 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-396 | LIVE WIRE NETWORKS, INC. - CO | 2005-06-01 | yes | yes |
| 303-397 | Lumen QWEST CORPORATION | – | no | yes |
| 303-398 | Lumen QWEST CORPORATION | – | no | yes |
| 303-399 | Lumen QWEST CORPORATION | – | no | yes |
| 303-400 | Lumen QWEST CORPORATION | – | no | yes |
| 303-401 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-402 | Lumen QWEST CORPORATION | – | no | yes |
| 303-403 | Lumen QWEST CORPORATION | – | no | yes |
| 303-404 | Lumen QWEST CORPORATION | – | no | yes |
| 303-405 | Lumen QWEST CORPORATION | – | no | yes |
| 303-406 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-407 | Onvoy ONVOY, LLC - CO | – | no | yes |
| 303-408 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 303-409 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-410 | Lumen QWEST CORPORATION | – | no | yes |
| 303-412 | Lumen QWEST CORPORATION | – | no | yes |
| 303-413 | Lumen QWEST CORPORATION | – | no | yes |
| 303-414 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-415 | Lumen QWEST CORPORATION | – | no | yes |
| 303-416 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-417 | Lumen QWEST CORPORATION | – | no | yes |
| 303-418 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-419 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-420 | Lumen QWEST CORPORATION | – | no | yes |
| 303-421 | Lumen QWEST CORPORATION | – | no | yes |
| 303-422 | Lumen QWEST CORPORATION | – | no | yes |
| 303-423 | Lumen QWEST CORPORATION | – | no | yes |
| 303-424 | Lumen QWEST CORPORATION | – | no | yes |
| 303-425 | Lumen QWEST CORPORATION | – | no | yes |
| 303-426 | Lumen QWEST CORPORATION | – | no | yes |
| 303-427 | Lumen QWEST CORPORATION | – | no | yes |
| 303-428 | Lumen QWEST CORPORATION | – | no | yes |
| 303-429 | Lumen QWEST CORPORATION | – | no | yes |
| 303-430 | Lumen QWEST CORPORATION | – | no | yes |
| 303-431 | Lumen QWEST CORPORATION | – | no | yes |
| 303-432 | Lumen QWEST CORPORATION | – | no | yes |
| 303-433 | Lumen QWEST CORPORATION | – | no | yes |
| 303-434 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-435 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-436 | Lumen QWEST CORPORATION | – | no | yes |
| 303-437 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-438 | Lumen QWEST CORPORATION | – | no | yes |
| 303-439 | Lumen QWEST CORPORATION | – | no | yes |
| 303-440 | Lumen QWEST CORPORATION | – | no | yes |
| 303-441 | Lumen QWEST CORPORATION | – | no | yes |
| 303-442 | Lumen QWEST CORPORATION | – | no | yes |
| 303-443 | Lumen QWEST CORPORATION | – | no | yes |
| 303-444 | Lumen QWEST CORPORATION | – | no | yes |
| 303-445 | Lumen QWEST CORPORATION | – | no | yes |
| 303-446 | Lumen QWEST CORPORATION | – | no | yes |
| 303-447 | Lumen QWEST CORPORATION | – | no | yes |
| 303-448 | Lumen QWEST CORPORATION | – | no | yes |
| 303-449 | Lumen QWEST CORPORATION | – | no | yes |
| 303-450 | Lumen QWEST CORPORATION | – | no | yes |
| 303-451 | Lumen QWEST CORPORATION | – | no | yes |
| 303-452 | Lumen QWEST CORPORATION | – | no | yes |
| 303-453 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-454 | Lumen QWEST CORPORATION | – | no | yes |
| 303-455 | Lumen QWEST CORPORATION | – | no | yes |
| 303-456 | Lumen QWEST CORPORATION | – | no | yes |
| 303-457 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-458 | Lumen QWEST CORPORATION | – | no | yes |
| 303-459 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-460 | Lumen QWEST CORPORATION | – | no | yes |
| 303-461 | Spok SPOK, INC. | – | no | yes |
| 303-462 | Lumen QWEST CORPORATION | – | no | yes |
| 303-463 | Lumen QWEST CORPORATION | – | no | yes |
| 303-464 | Lumen QWEST CORPORATION | – | no | yes |
| 303-465 | Lumen QWEST CORPORATION | – | no | yes |
| 303-466 | Lumen QWEST CORPORATION | – | no | yes |
| 303-467 | Lumen QWEST CORPORATION | – | no | yes |
| 303-468 | Onvoy ONVOY, LLC - CO | – | yes | yes |
| 303-469 | Lumen QWEST CORPORATION | – | no | yes |
| 303-470 | Lumen QWEST CORPORATION | – | no | yes |
| 303-471 | Lumen QWEST CORPORATION | – | no | yes |
| 303-472 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-473 | Lumen QWEST CORPORATION | – | no | yes |
| 303-474 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-475 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-476 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-477 | Lumen QWEST CORPORATION | – | no | yes |
| 303-478 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-479 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-480 | Lumen QWEST CORPORATION | – | no | yes |
| 303-481 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-482 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-483 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-484 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-486 | Lumen QWEST CORPORATION | – | no | yes |
| 303-487 | Lumen QWEST CORPORATION | – | no | yes |
| 303-488 | Lumen QWEST CORPORATION | – | no | yes |
| 303-489 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-490 | Spok SPOK, INC. | – | no | yes |
| 303-491 | Charter ONVOY SPECTRUM, LLC | 2022-05-03 | yes | yes |
| 303-492 | Lumen QWEST CORPORATION | – | no | yes |
| 303-493 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-494 | Lumen QWEST CORPORATION | – | no | yes |
| 303-495 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-496 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2004-04-08 | yes | yes |
| 303-497 | Lumen QWEST CORPORATION | – | no | yes |
| 303-498 | Comcast COMCAST IP PHONE, LLC | 2005-04-22 | yes | yes |
| 303-499 | Lumen QWEST CORPORATION | – | no | yes |
| 303-501 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 2006-01-26 | yes | yes |
| 303-503 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-504 | Lumen QWEST CORPORATION | – | no | yes |
| 303-505 | T-Mobile T-MOBILE USA, INC. | 2012-11-09 | yes | yes |
| 303-507 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-508 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-509 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-510 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-512 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-513 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2002-02-15 | no | yes |
| 303-514 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-515 | Onvoy ONVOY, LLC - CO | 2011-11-14 | yes | yes |
| 303-516 | Lumen QWEST CORPORATION | – | no | yes |
| 303-517 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-518 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-519 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | yes | yes |
| 303-520 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-521 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-522 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-523 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-524 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-525 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-526 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-527 | Lumen QWEST CORPORATION | – | no | yes |
| 303-528 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-529 | Onvoy ONVOY, LLC - CO | 2019-10-07 | yes | yes |
| 303-530 | Lumen QWEST CORPORATION | – | no | yes |
| 303-531 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-533 | Lumen QWEST CORPORATION | – | no | yes |
| 303-534 | Lumen QWEST CORPORATION | – | no | yes |
| 303-537 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-538 | Lumen QWEST CORPORATION | – | no | yes |
| 303-539 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-540 | Spok SPOK, INC. | – | no | yes |
| 303-541 | Lumen QWEST CORPORATION | – | no | yes |
| 303-542 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-543 | Lumen QWEST CORPORATION | – | no | yes |
| 303-544 | Lumen QWEST CORPORATION | – | no | yes |
| 303-545 | Lumen QWEST CORPORATION | – | no | yes |
| 303-546 | Lumen QWEST CORPORATION | – | no | yes |
| 303-547 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-548 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-549 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-550 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-551 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-552 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-553 | Spok SPOK, INC. | – | no | yes |
| 303-554 | Lumen QWEST CORPORATION | – | no | yes |
| 303-556 | Lumen QWEST CORPORATION | – | no | yes |
| 303-557 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-558 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-559 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-560 | Spok SPOK, INC. | – | no | yes |
| 303-561 | Lumen QWEST CORPORATION | – | no | yes |
| 303-562 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-563 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-564 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-565 | Onvoy ONVOY, LLC - CO | – | yes | yes |
| 303-566 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-567 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-568 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-570 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-571 | Lumen QWEST CORPORATION | – | no | yes |
| 303-572 | Lumen QWEST CORPORATION | – | no | yes |
| 303-573 | Lumen QWEST CORPORATION | – | no | yes |
| 303-574 | Lumen QWEST CORPORATION | – | no | yes |
| 303-575 | Lumen QWEST CORPORATION | – | no | yes |
| 303-576 | Lumen QWEST CORPORATION | – | no | yes |
| 303-577 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | no | yes |
| 303-579 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-580 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-581 | Lumen QWEST CORPORATION | – | no | yes |
| 303-582 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-583 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | no | yes |
| 303-584 | Lumen QWEST CORPORATION | – | no | yes |
| 303-585 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-586 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-587 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-588 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-589 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-590 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-591 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-592 | Lumen QWEST CORPORATION | – | no | yes |
| 303-593 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-594 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-595 | Lumen QWEST CORPORATION | – | no | yes |
| 303-596 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-597 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 303-598 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-599 | Spok SPOK, INC. | – | no | yes |
| 303-600 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-601 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-602 | Lumen QWEST CORPORATION | – | no | yes |
| 303-603 | Lumen QWEST CORPORATION | – | no | yes |
| 303-604 | Lumen QWEST CORPORATION | – | no | yes |
| 303-605 | Lumen QWEST CORPORATION | – | no | yes |
| 303-606 | Lumen QWEST CORPORATION | – | no | yes |
| 303-607 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-608 | Lumen QWEST CORPORATION | – | no | yes |
| 303-609 | Spok SPOK, INC. | – | no | yes |
| 303-610 | Spok SPOK, INC. | – | no | yes |
| 303-612 | Spok SPOK, INC. | – | no | yes |
| 303-613 | Spok SPOK, INC. | – | no | yes |
| 303-614 | Lumen QWEST CORPORATION | – | no | yes |
| 303-615 | Lumen QWEST CORPORATION | – | no | yes |
| 303-617 | Lumen QWEST CORPORATION | – | no | yes |
| 303-618 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-619 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-620 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-621 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-623 | Lumen QWEST CORPORATION | – | no | yes |
| 303-624 | Lumen QWEST CORPORATION | – | no | yes |
| 303-625 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-626 | Lumen QWEST CORPORATION | – | no | yes |
| 303-627 | Lumen QWEST CORPORATION | – | no | yes |
| 303-628 | Lumen QWEST CORPORATION | – | no | yes |
| 303-629 | Lumen QWEST CORPORATION | – | no | yes |
| 303-630 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-632 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-633 | Lumen QWEST CORPORATION | – | no | yes |
| 303-634 | Lumen QWEST CORPORATION | – | no | yes |
| 303-635 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-636 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-637 | Lumen QWEST CORPORATION | – | no | yes |
| 303-638 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-639 | Lumen QWEST CORPORATION | – | no | yes |
| 303-640 | Lumen QWEST CORPORATION | – | no | yes |
| 303-641 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-642 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-643 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-645 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-646 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-648 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-649 | Lumen QWEST CORPORATION | – | no | yes |
| 303-650 | Lumen QWEST CORPORATION | – | no | yes |
| 303-653 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-654 | Lumen QWEST CORPORATION | – | no | yes |
| 303-655 | Lumen QWEST CORPORATION | – | no | yes |
| 303-656 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | yes | yes |
| 303-657 | Lumen QWEST CORPORATION | – | no | yes |
| 303-658 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-659 | Lumen QWEST CORPORATION | – | no | yes |
| 303-660 | Lumen QWEST CORPORATION | – | no | yes |
| 303-661 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-662 | Lumen QWEST CORPORATION | – | no | yes |
| 303-663 | Lumen QWEST CORPORATION | – | no | yes |
| 303-664 | Lumen QWEST CORPORATION | – | no | yes |
| 303-665 | Lumen QWEST CORPORATION | – | no | yes |
| 303-666 | Lumen QWEST CORPORATION | – | no | yes |
| 303-667 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-668 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-669 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-670 | Lumen QWEST CORPORATION | – | no | yes |
| 303-671 | Lumen QWEST CORPORATION | – | no | yes |
| 303-672 | Lumen QWEST CORPORATION | – | no | yes |
| 303-673 | Lumen QWEST CORPORATION | – | no | yes |
| 303-674 | Lumen QWEST CORPORATION | – | no | yes |
| 303-675 | Lumen QWEST CORPORATION | – | no | yes |
| 303-676 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-677 | Lumen QWEST CORPORATION | – | no | yes |
| 303-679 | Lumen QWEST CORPORATION | – | no | yes |
| 303-680 | Lumen QWEST CORPORATION | – | no | yes |
| 303-681 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-683 | Lumen QWEST CORPORATION | – | no | yes |
| 303-685 | Lumen QWEST CORPORATION | – | no | yes |
| 303-686 | Spok SPOK, INC. | – | no | yes |
| 303-687 | Spok SPOK, INC. | – | no | yes |
| 303-688 | Lumen QWEST CORPORATION | – | no | yes |
| 303-689 | Lumen QWEST CORPORATION | – | no | yes |
| 303-690 | Lumen QWEST CORPORATION | – | no | yes |
| 303-691 | Lumen QWEST CORPORATION | – | no | yes |
| 303-692 | Lumen QWEST CORPORATION | – | no | yes |
| 303-693 | Lumen QWEST CORPORATION | – | no | yes |
| 303-694 | Lumen QWEST CORPORATION | – | no | yes |
| 303-695 | Lumen QWEST CORPORATION | – | no | yes |
| 303-696 | Lumen QWEST CORPORATION | – | no | yes |
| 303-697 | Lumen QWEST CORPORATION | – | no | yes |
| 303-698 | Lumen QWEST CORPORATION | – | no | yes |
| 303-699 | Lumen QWEST CORPORATION | – | no | yes |
| 303-701 | COMMUNICATIONS UNLIMITED | – | no | yes |
| 303-703 | Lumen QWEST CORPORATION | – | no | yes |
| 303-704 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-705 | Lumen QWEST CORPORATION | – | no | yes |
| 303-706 | Lumen QWEST CORPORATION | – | no | yes |
| 303-707 | Lumen QWEST CORPORATION | – | no | yes |
| 303-708 | Lumen QWEST CORPORATION | – | no | yes |
| 303-712 | Lumen QWEST CORPORATION | – | no | yes |
| 303-713 | Lumen QWEST CORPORATION | – | no | yes |
| 303-714 | Lumen QWEST CORPORATION | – | no | yes |
| 303-715 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-716 | Lumen QWEST CORPORATION | – | no | yes |
| 303-721 | Lumen QWEST CORPORATION | – | no | yes |
| 303-722 | Lumen QWEST CORPORATION | – | no | yes |
| 303-723 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | no | yes |
| 303-724 | Lumen QWEST CORPORATION | – | no | yes |
| 303-725 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-726 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-727 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-728 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-729 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-730 | Lumen QWEST CORPORATION | – | no | yes |
| 303-731 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-733 | Lumen QWEST CORPORATION | – | no | yes |
| 303-734 | Lumen QWEST CORPORATION | – | no | yes |
| 303-735 | Lumen QWEST CORPORATION | – | no | yes |
| 303-736 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-737 | Lumen QWEST CORPORATION | – | no | yes |
| 303-738 | Lumen QWEST CORPORATION | – | no | yes |
| 303-739 | Lumen QWEST CORPORATION | – | no | yes |
| 303-740 | Lumen QWEST CORPORATION | – | no | yes |
| 303-741 | Lumen QWEST CORPORATION | – | no | yes |
| 303-742 | Lumen QWEST CORPORATION | – | no | yes |
| 303-743 | Lumen QWEST CORPORATION | – | no | yes |
| 303-744 | Lumen QWEST CORPORATION | – | no | yes |
| 303-745 | Lumen QWEST CORPORATION | – | no | yes |
| 303-748 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-749 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-750 | Lumen QWEST CORPORATION | – | no | yes |
| 303-751 | Lumen QWEST CORPORATION | – | no | yes |
| 303-752 | Lumen QWEST CORPORATION | – | no | yes |
| 303-753 | Lumen QWEST CORPORATION | – | no | yes |
| 303-754 | Lumen QWEST CORPORATION | – | no | yes |
| 303-755 | Lumen QWEST CORPORATION | – | no | yes |
| 303-756 | Lumen QWEST CORPORATION | – | no | yes |
| 303-757 | Lumen QWEST CORPORATION | – | no | yes |
| 303-758 | Lumen QWEST CORPORATION | – | no | yes |
| 303-759 | Lumen QWEST CORPORATION | – | no | yes |
| 303-760 | Spok SPOK, INC. | – | no | yes |
| 303-761 | Lumen QWEST CORPORATION | – | no | yes |
| 303-762 | Lumen QWEST CORPORATION | – | no | yes |
| 303-763 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-764 | Lumen QWEST CORPORATION | – | no | yes |
| 303-765 | Lumen QWEST CORPORATION | – | no | yes |
| 303-766 | Lumen QWEST CORPORATION | – | no | yes |
| 303-767 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 303-768 | Lumen QWEST CORPORATION | – | no | yes |
| 303-770 | Lumen QWEST CORPORATION | – | no | yes |
| 303-771 | Lumen QWEST CORPORATION | – | no | yes |
| 303-773 | Lumen QWEST CORPORATION | – | no | yes |
| 303-777 | Lumen QWEST CORPORATION | – | no | yes |
| 303-778 | Lumen QWEST CORPORATION | – | no | yes |
| 303-779 | Lumen QWEST CORPORATION | – | no | yes |
| 303-780 | Lumen QWEST CORPORATION | – | no | yes |
| 303-781 | Lumen QWEST CORPORATION | – | no | yes |
| 303-782 | Lumen QWEST CORPORATION | – | no | yes |
| 303-783 | Lumen QWEST CORPORATION | – | no | yes |
| 303-784 | Lumen QWEST CORPORATION | – | no | yes |
| 303-785 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-786 | Lumen QWEST CORPORATION | – | no | yes |
| 303-787 | Lumen QWEST CORPORATION | – | no | yes |
| 303-788 | Lumen QWEST CORPORATION | – | no | yes |
| 303-789 | Lumen QWEST CORPORATION | – | no | yes |
| 303-790 | Lumen QWEST CORPORATION | – | no | yes |
| 303-791 | Lumen QWEST CORPORATION | – | no | yes |
| 303-792 | Lumen QWEST CORPORATION | – | no | yes |
| 303-793 | Lumen QWEST CORPORATION | – | no | yes |
| 303-794 | Lumen QWEST CORPORATION | – | no | yes |
| 303-795 | Lumen QWEST CORPORATION | – | no | yes |
| 303-796 | Lumen QWEST CORPORATION | – | no | yes |
| 303-797 | Lumen QWEST CORPORATION | – | no | yes |
| 303-798 | Lumen QWEST CORPORATION | – | no | yes |
| 303-799 | Lumen QWEST CORPORATION | – | no | yes |
| 303-800 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | no | yes |
| 303-801 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-802 | Lumen LEVEL 3 TELECOM OF COLORADO, LLC - CO | – | yes | yes |
| 303-803 | Lumen LEVEL 3 TELECOM OF COLORADO, LLC - CO | – | yes | yes |
| 303-804 | Lumen QWEST CORPORATION | – | no | yes |
| 303-805 | Lumen QWEST CORPORATION | – | no | yes |
| 303-806 | Lumen QWEST CORPORATION | – | no | yes |
| 303-807 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-808 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-809 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-810 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-812 | Lumen QWEST CORPORATION | – | no | yes |
| 303-813 | Lumen QWEST CORPORATION | – | no | yes |
| 303-814 | Lumen QWEST CORPORATION | – | no | yes |
| 303-815 | INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO | 2005-02-03 | yes | yes |
| 303-817 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-818 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-819 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-820 | Lumen QWEST CORPORATION | – | no | yes |
| 303-821 | Spok SPOK, INC. | – | no | yes |
| 303-824 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-825 | Lumen QWEST CORPORATION | – | no | yes |
| 303-826 | Spok SPOK, INC. | – | no | yes |
| 303-828 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-829 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-830 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-831 | Lumen QWEST CORPORATION | – | no | yes |
| 303-832 | Lumen QWEST CORPORATION | – | no | yes |
| 303-833 | Lumen QWEST CORPORATION | – | no | yes |
| 303-835 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-836 | COMMUNICATIONS UNLIMITED | – | no | yes |
| 303-837 | Lumen QWEST CORPORATION | – | no | yes |
| 303-839 | Lumen QWEST CORPORATION | – | no | yes |
| 303-840 | Lumen QWEST CORPORATION | – | no | yes |
| 303-841 | Lumen QWEST CORPORATION | – | no | yes |
| 303-842 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | yes | yes |
| 303-843 | Lumen QWEST CORPORATION | – | no | yes |
| 303-844 | Lumen QWEST CORPORATION | – | no | yes |
| 303-846 | Lumen QWEST CORPORATION | – | no | yes |
| 303-847 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-850 | Lumen QWEST CORPORATION | – | no | yes |
| 303-851 | Spok SPOK, INC. | – | no | yes |
| 303-852 | Spok SPOK, INC. | – | no | yes |
| 303-853 | Lumen QWEST CORPORATION | – | no | yes |
| 303-854 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-855 | Spok SPOK, INC. | – | no | yes |
| 303-856 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-858 | Lumen QWEST CORPORATION | – | no | yes |
| 303-859 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | yes | yes |
| 303-860 | Lumen QWEST CORPORATION | – | no | yes |
| 303-861 | Lumen QWEST CORPORATION | – | no | yes |
| 303-862 | Comcast COMCAST IP PHONE, LLC | 2005-06-04 | yes | yes |
| 303-863 | Lumen QWEST CORPORATION | – | no | yes |
| 303-864 | Lumen QWEST CORPORATION | – | no | yes |
| 303-865 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-866 | Lumen QWEST CORPORATION | – | no | yes |
| 303-867 | ILOKA, INC. DBA NEWCLOUD NETWORKS - CO | 2005-11-04 | yes | yes |
| 303-868 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-869 | Lumen QWEST CORPORATION | – | no | yes |
| 303-870 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-871 | Lumen QWEST CORPORATION | – | no | yes |
| 303-872 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-873 | Lumen QWEST CORPORATION | – | no | yes |
| 303-874 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-875 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-876 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-877 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-878 | Spok SPOK, INC. | – | no | yes |
| 303-879 | Onvoy ONVOY, LLC - CO | 2023-08-15 | yes | yes |
| 303-880 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-881 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-882 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-883 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-884 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-885 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-12 | no | yes |
| 303-886 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-12 | no | yes |
| 303-887 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-12 | no | yes |
| 303-888 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-889 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-890 | Spok SPOK, INC. | – | no | yes |
| 303-891 | Spok SPOK, INC. | – | no | yes |
| 303-892 | Lumen QWEST CORPORATION | – | no | yes |
| 303-893 | Lumen QWEST CORPORATION | – | no | yes |
| 303-894 | Lumen QWEST CORPORATION | – | no | yes |
| 303-895 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | yes | yes |
| 303-896 | Lumen QWEST CORPORATION | – | no | yes |
| 303-897 | Spok SPOK, INC. | – | no | yes |
| 303-898 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 303-899 | Lumen QWEST CORPORATION | – | no | yes |
| 303-901 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-902 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-903 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-904 | Lumen QWEST CORPORATION | – | no | yes |
| 303-905 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-906 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-907 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-908 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-909 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-910 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-912 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-913 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-914 | Lumen QWEST CORPORATION | – | no | yes |
| 303-915 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-916 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-917 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | yes | yes |
| 303-918 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-919 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-920 | Lumen QWEST CORPORATION | – | no | yes |
| 303-921 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-922 | Lumen QWEST CORPORATION | – | no | yes |
| 303-923 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-924 | Lumen QWEST CORPORATION | – | no | yes |
| 303-925 | Lumen QWEST CORPORATION | – | no | yes |
| 303-926 | Lumen QWEST CORPORATION | – | no | yes |
| 303-927 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-928 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-929 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-930 | Lumen QWEST CORPORATION | – | no | yes |
| 303-931 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-932 | Lumen QWEST CORPORATION | – | no | yes |
| 303-933 | Lumen QWEST CORPORATION | – | no | yes |
| 303-934 | Lumen QWEST CORPORATION | – | no | yes |
| 303-935 | Lumen QWEST CORPORATION | – | no | yes |
| 303-936 | Lumen QWEST CORPORATION | – | no | yes |
| 303-937 | Lumen QWEST CORPORATION | – | no | yes |
| 303-938 | Lumen QWEST CORPORATION | – | no | yes |
| 303-939 | Lumen QWEST CORPORATION | – | no | yes |
| 303-940 | Lumen QWEST CORPORATION | – | no | yes |
| 303-941 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-942 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CO | – | yes | yes |
| 303-943 | SKYE TELECOM LLC DBA SKYETEL | 2021-09-09 | yes | yes |
| 303-944 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-945 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 303-946 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-947 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-948 | Lumen QWEST CORPORATION | – | no | yes |
| 303-949 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-951 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-952 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-953 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-954 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-955 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-957 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-960 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 303-961 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-962 | Onvoy ONVOY, LLC - CO | – | yes | yes |
| 303-963 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-964 | Lumen QWEST CORPORATION | – | no | yes |
| 303-965 | Lumen QWEST CORPORATION | – | no | yes |
| 303-966 | Lumen QWEST CORPORATION | – | no | yes |
| 303-967 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-968 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 303-969 | Lumen QWEST CORPORATION | – | no | yes |
| 303-971 | Lumen QWEST CORPORATION | – | no | yes |
| 303-972 | Lumen QWEST CORPORATION | – | no | yes |
| 303-973 | Lumen QWEST CORPORATION | – | no | yes |
| 303-974 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CO | – | yes | yes |
| 303-975 | Lumen QWEST CORPORATION | – | yes | yes |
| 303-977 | Lumen QWEST CORPORATION | – | no | yes |
| 303-978 | Lumen QWEST CORPORATION | – | no | yes |
| 303-979 | Lumen QWEST CORPORATION | – | no | yes |
| 303-980 | Lumen QWEST CORPORATION | – | no | yes |
| 303-981 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | – | no | yes |
| 303-982 | Lumen QWEST CORPORATION | – | no | yes |
| 303-984 | Lumen QWEST CORPORATION | – | no | yes |
| 303-985 | Lumen QWEST CORPORATION | – | no | yes |
| 303-986 | Lumen QWEST CORPORATION | – | no | yes |
| 303-987 | Lumen QWEST CORPORATION | – | no | yes |
| 303-988 | Lumen QWEST CORPORATION | – | no | yes |
| 303-989 | Lumen QWEST CORPORATION | – | no | yes |
| 303-991 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 303-992 | Lumen QWEST CORPORATION | – | no | yes |
| 303-993 | Onvoy ONVOY, LLC - CO | 2007-03-27 | yes | yes |
| 303-994 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-995 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 303-996 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | no | yes |
| 303-997 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 303-998 | Lumen QWEST CORPORATION | – | no | yes |
| 303-999 | Comcast COMCAST IP PHONE, LLC | 2007-08-24 | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| QWEST CORPORATION | Lumen | 429 | 58.4% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | Verizon | 52 | 7.1% |
| LEVEL 3 COMMUNICATIONS, LLC - CO | Lumen | 52 | 7.1% |
| T-MOBILE USA, INC. | T-Mobile | 38 | 5.2% |
| SPOK, INC. | Spok | 31 | 4.2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 31 | 4.2% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 31 | 4.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CO | AT&T | 27 | 3.7% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 11 | 1.5% |
| ONVOY, LLC - CO | Onvoy | 11 | 1.5% |
| COMCAST IP PHONE, LLC | Comcast | 7 | 1% |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Allstream | 3 | 0.4% |
| COMMUNICATIONS UNLIMITED | – | 2 | 0.3% |
| LEVEL 3 TELECOM OF COLORADO, LLC - CO | Lumen | 2 | 0.3% |
| N.E. COLORADO CELLULAR, INC. | – | 1 | 0.1% |
| HD CARRIER LLC | – | 1 | 0.1% |
| ELBERT COUNTY WIRELESS, LLC | – | 1 | 0.1% |
| LIVE WIRE NETWORKS, INC. - CO | – | 1 | 0.1% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 0.1% |
| INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO | – | 1 | 0.1% |
| ILOKA, INC. DBA NEWCLOUD NETWORKS - CO | – | 1 | 0.1% |
| SKYE TELECOM LLC DBA SKYETEL | – | 1 | 0.1% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to DENVER in area code 303?
735 blocks: 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 212 and 723 more, all listed in the table above.
Which carriers have numbers in DENVER?
QWEST CORPORATION (429 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (52 blocks), LEVEL 3 COMMUNICATIONS, LLC - CO (52 blocks), T-MOBILE USA, INC. (38 blocks), SPOK, INC. (31 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (31 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is DENVER a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.