QWEST CORPORATION
449 prefixes in 303 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 303-375 | DENVER | 9636 | — | — |
| 303-377 | DENVER | 9636 | — | — |
| 303-380 | DENVER | 9636 | — | — |
| 303-382 | DENVER | 9636 | — | — |
| 303-383 | DENVER | 9636 | — | — |
| 303-384 | DENVER | 9636 | — | — |
| 303-387 | DENVER | 9636 | — | — |
| 303-388 | DENVER | 9636 | — | — |
| 303-389 | DENVER | 9636 | — | Yes |
| 303-391 | DENVER | 9636 | — | — |
| 303-393 | DENVER | 9636 | — | — |
| 303-394 | DENVER | 9636 | — | — |
| 303-397 | DENVER | 9636 | — | — |
| 303-398 | DENVER | 9636 | — | — |
| 303-399 | DENVER | 9636 | — | — |
| 303-400 | DENVER | 9636 | — | — |
| 303-401 | DENVER | 9636 | — | Yes |
| 303-402 | DENVER | 9636 | — | — |
| 303-403 | DENVER | 9636 | — | — |
| 303-404 | DENVER | 9636 | — | — |
| 303-405 | DENVER | 9636 | — | — |
| 303-410 | DENVER | 9636 | — | — |
| 303-412 | DENVER | 9636 | — | — |
| 303-413 | DENVER | 9636 | — | — |
| 303-415 | DENVER | 9636 | — | — |
| 303-417 | DENVER | 9636 | — | — |
| 303-420 | DENVER | 9636 | — | — |
| 303-421 | DENVER | 9636 | — | — |
| 303-422 | DENVER | 9636 | — | — |
| 303-423 | DENVER | 9636 | — | — |
| 303-424 | DENVER | 9636 | — | — |
| 303-425 | DENVER | 9636 | — | — |
| 303-426 | DENVER | 9636 | — | — |
| 303-427 | DENVER | 9636 | — | — |
| 303-428 | DENVER | 9636 | — | — |
| 303-429 | DENVER | 9636 | — | — |
| 303-430 | DENVER | 9636 | — | — |
| 303-431 | DENVER | 9636 | — | — |
| 303-432 | DENVER | 9636 | — | — |
| 303-433 | DENVER | 9636 | — | — |
| 303-436 | DENVER | 9636 | — | — |
| 303-438 | DENVER | 9636 | — | — |
| 303-439 | DENVER | 9636 | — | — |
| 303-440 | DENVER | 9636 | — | — |
| 303-441 | DENVER | 9636 | — | — |
| 303-442 | DENVER | 9636 | — | — |
| 303-443 | DENVER | 9636 | — | — |
| 303-444 | DENVER | 9636 | — | — |
| 303-445 | DENVER | 9636 | — | — |
| 303-446 | DENVER | 9636 | — | — |
| 303-447 | DENVER | 9636 | — | — |
| 303-448 | DENVER | 9636 | — | — |
| 303-449 | DENVER | 9636 | — | — |
| 303-450 | DENVER | 9636 | — | — |
| 303-451 | DENVER | 9636 | — | — |
| 303-452 | DENVER | 9636 | — | — |
| 303-453 | DENVER | 9636 | — | Yes |
| 303-454 | DENVER | 9636 | — | — |
| 303-455 | DENVER | 9636 | — | — |
| 303-456 | DENVER | 9636 | — | — |
| 303-457 | DENVER | 9636 | — | Yes |
| 303-458 | DENVER | 9636 | — | — |
| 303-459 | DENVER | 9636 | — | Yes |
| 303-460 | DENVER | 9636 | — | — |
| 303-462 | DENVER | 9636 | — | — |
| 303-463 | DENVER | 9636 | — | — |
| 303-464 | DENVER | 9636 | — | — |
| 303-465 | DENVER | 9636 | — | — |
| 303-466 | DENVER | 9636 | — | — |
| 303-467 | DENVER | 9636 | — | — |
| 303-469 | DENVER | 9636 | — | — |
| 303-470 | DENVER | 9636 | — | — |
| 303-471 | DENVER | 9636 | — | — |
| 303-473 | DENVER | 9636 | — | — |
| 303-477 | DENVER | 9636 | — | — |
| 303-480 | DENVER | 9636 | — | — |
| 303-485 | LONGMONT | 9636 | — | — |
| 303-486 | DENVER | 9636 | — | — |
| 303-487 | DENVER | 9636 | — | — |
| 303-488 | DENVER | 9636 | — | — |
| 303-492 | DENVER | 9636 | — | — |
| 303-494 | DENVER | 9636 | — | — |
| 303-497 | DENVER | 9636 | — | — |
| 303-499 | DENVER | 9636 | — | — |
| 303-504 | DENVER | 9636 | — | — |
| 303-512 | DENVER | 9636 | — | Yes |
| 303-516 | DENVER | 9636 | — | — |
| 303-526 | DENVER | 9636 | — | Yes |
| 303-527 | DENVER | 9636 | — | — |
| 303-530 | DENVER | 9636 | — | — |
| 303-533 | DENVER | 9636 | — | — |
| 303-534 | DENVER | 9636 | — | — |
| 303-536 | HUDSON | 9636 | — | Yes |
| 303-538 | DENVER | 9636 | — | — |
| 303-541 | DENVER | 9636 | — | — |
| 303-543 | DENVER | 9636 | — | — |
| 303-544 | DENVER | 9636 | — | — |
| 303-545 | DENVER | 9636 | — | — |
| 303-546 | DENVER | 9636 | — | — |
| 303-554 | DENVER | 9636 | — | — |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.