QWEST CORPORATION
201 prefixes in 520 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 520-205 | TUCSON | 9636 | — | Yes |
| 520-206 | TUCSON | 9636 | — | — |
| 520-209 | TUCSON | 9636 | — | — |
| 520-217 | CASAGRANDE | 9636 | 2015-12-29 | Yes |
| 520-218 | TUCSON | 9636 | — | — |
| 520-219 | TUCSON | 9636 | — | — |
| 520-222 | TUCSON | 9636 | 2011-10-06 | Yes |
| 520-225 | TUCSON | 9636 | — | Yes |
| 520-228 | TUCSON | 9636 | — | — |
| 520-229 | TUCSON | 9636 | — | Yes |
| 520-232 | TUCSON | 9636 | — | Yes |
| 520-243 | TUCSON | 9636 | — | Yes |
| 520-258 | TUCSON | 9636 | — | Yes |
| 520-281 | NOGALES | 9636 | — | — |
| 520-285 | NOGALES | 9636 | — | Yes |
| 520-287 | NOGALES | 9636 | — | — |
| 520-290 | TUCSON | 9636 | — | — |
| 520-291 | TUCSON | 9636 | — | — |
| 520-292 | TUCSON | 9636 | — | — |
| 520-293 | TUCSON | 9636 | — | — |
| 520-294 | TUCSON | 9636 | — | — |
| 520-295 | TUCSON | 9636 | — | — |
| 520-296 | TUCSON | 9636 | — | — |
| 520-297 | TUCSON | 9636 | — | — |
| 520-298 | TUCSON | 9636 | — | — |
| 520-299 | TUCSON | 9636 | — | — |
| 520-316 | CASAGRANDE | 9636 | — | — |
| 520-318 | TUCSON | 9636 | — | — |
| 520-319 | TUCSON | 9636 | — | — |
| 520-320 | TUCSON | 9636 | — | — |
| 520-321 | TUCSON | 9636 | — | — |
| 520-322 | TUCSON | 9636 | — | — |
| 520-323 | TUCSON | 9636 | — | — |
| 520-324 | TUCSON | 9636 | — | — |
| 520-325 | TUCSON | 9636 | — | — |
| 520-326 | TUCSON | 9636 | — | — |
| 520-327 | TUCSON | 9636 | — | — |
| 520-328 | TUCSON | 9636 | 2014-05-14 | Yes |
| 520-356 | HAYDEN | 9636 | — | Yes |
| 520-357 | HAYDEN | 9636 | — | Yes |
| 520-363 | HAYDEN | 9636 | — | Yes |
| 520-364 | DOUGLAS | 9636 | — | — |
| 520-366 | BISBEE | 9636 | — | Yes |
| 520-368 | DOUGLAS | 9636 | 2007-11-07 | Yes |
| 520-374 | CASAGRANDE | 9636 | — | — |
| 520-375 | NOGALES | 9636 | — | Yes |
| 520-377 | NOGALES | 9636 | — | — |
| 520-378 | SIERRAVIST | 9636 | — | — |
| 520-384 | WILLCOX | 9636 | — | — |
| 520-385 | SAN MANUEL | 9636 | — | Yes |
| 520-388 | TUCSON | 9636 | — | Yes |
| 520-393 | TUCSON | 9636 | — | Yes |
| 520-394 | NOGALES | 9636 | — | Yes |
| 520-397 | NOGALES | 9636 | — | Yes |
| 520-398 | TUCSON | 9636 | — | Yes |
| 520-399 | TUCSON | 9636 | — | Yes |
| 520-407 | TUCSON | 9636 | — | Yes |
| 520-408 | TUCSON | 9636 | — | — |
| 520-410 | TUCSON | 9636 | — | — |
| 520-417 | SIERRAVIST | 9636 | — | — |
| 520-421 | CASAGRANDE | 9636 | — | — |
| 520-423 | CASAGRANDE | 9636 | — | Yes |
| 520-424 | CASAGRANDE | 9636 | — | Yes |
| 520-426 | CASAGRANDE | 9636 | — | — |
| 520-432 | BISBEE | 9636 | — | Yes |
| 520-434 | TUCSON | 9636 | — | Yes |
| 520-439 | SIERRAVIST | 9636 | — | — |
| 520-452 | SIERRAVIST | 9636 | — | — |
| 520-454 | SIERRAVIST | 9636 | 2009-02-13 | Yes |
| 520-455 | NOGALES | 9636 | — | Yes |
| 520-456 | SIERRAVIST | 9636 | — | Yes |
| 520-457 | TOMBSTONE | 9636 | — | Yes |
| 520-458 | SIERRAVIST | 9636 | — | — |
| 520-459 | SIERRAVIST | 9636 | — | — |
| 520-463 | WHITLOW | 9636 | — | Yes |
| 520-464 | CASAGRANDE | 9636 | — | Yes |
| 520-466 | CASAGRANDE | 9636 | — | — |
| 520-469 | TUCSON | 9636 | — | — |
| 520-472 | CASAGRANDE | 9636 | 2019-08-26 | Yes |
| 520-487 | SAN MANUEL | 9636 | — | Yes |
| 520-489 | TUCSON | 9636 | — | — |
| 520-494 | CASAGRANDE | 9636 | — | Yes |
| 520-498 | TUCSON | 9636 | — | — |
| 520-512 | TUCSON | 9636 | — | Yes |
| 520-513 | TUCSON | 9636 | — | Yes |
| 520-514 | TUCSON | 9636 | — | — |
| 520-515 | SIERRAVIST | 9636 | — | — |
| 520-516 | TUCSON | 9636 | — | — |
| 520-519 | TUCSON | 9636 | — | Yes |
| 520-529 | TUCSON | 9636 | — | — |
| 520-531 | TUCSON | 9636 | — | — |
| 520-533 | SIERRAVIST | 9636 | — | — |
| 520-538 | SIERRAVIST | 9636 | — | — |
| 520-544 | TUCSON | 9636 | — | — |
| 520-546 | TUCSON | 9636 | — | — |
| 520-566 | TUCSON | 9636 | — | — |
| 520-568 | CASAGRANDE | 9636 | — | — |
| 520-570 | TUCSON | 9636 | — | Yes |
| 520-571 | TUCSON | 9636 | — | Yes |
| 520-572 | TUCSON | 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.