All assignees
326 prefixes in 623 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 623-300 | PHOENIX | 630E | 2015-08-12 | Yes |
| 623-301 | PHOENIX | 6572 | 2022-09-23 | Yes |
| 623-302 | PHOENIX | 6572 | 2007-10-09 | Yes |
| 623-303 | PHOENIX | 630E | 2020-11-09 | Yes |
| 623-304 | PHOENIX | 630E | 2022-06-03 | Yes |
| 623-305 | PHOENIX | 6010 | 2023-03-09 | Yes |
| 623-306 | PHOENIX | 624H | — | Yes |
| 623-307 | PHOENIX | 907K | 2023-04-18 | Yes |
| 623-308 | PHOENIX | 7217 | — | Yes |
| 623-309 | PHOENIX | 624H | 2023-06-12 | Yes |
| 623-310 | PHOENIX | 630E | 2026-08-14 | Yes |
| 623-311 | XXXXXXXXXX | MULT | — | — |
| 623-312 | PHOENIX | 318J | — | Yes |
| 623-313 | PHOENIX | 6010 | 2006-04-06 | Yes |
| 623-320 | PHOENIX | 6529 | 2022-09-20 | Yes |
| 623-321 | PHOENIX | 630E | — | — |
| 623-322 | PHOENIX | 318J | — | — |
| 623-323 | PHOENIX | 630E | 2020-02-20 | Yes |
| 623-324 | PHOENIX | 624H | 2022-08-31 | Yes |
| 623-326 | PHOENIX | 6529 | — | — |
| 623-327 | PHOENIX | 9636 | — | Yes |
| 623-328 | PHOENIX | 9636 | — | Yes |
| 623-329 | PHOENIX | 6010 | 2001-10-24 | — |
| 623-330 | PHOENIX | 6529 | — | — |
| 623-332 | PHOENIX | 6529 | — | — |
| 623-333 | PHOENIX | 9636 | 2006-08-29 | Yes |
| 623-334 | PHOENIX | 9636 | — | — |
| 623-335 | PHOENIX | 587F | 2011-07-06 | Yes |
| 623-336 | PHOENIX | 6010 | 2010-04-05 | Yes |
| 623-337 | PHOENIX | 7217 | — | Yes |
| 623-340 | PHOENIX | 6529 | — | Yes |
| 623-341 | PHOENIX | 6529 | — | Yes |
| 623-343 | PHOENIX | 630E | 2022-09-01 | Yes |
| 623-344 | PHOENIX | 7175 | — | Yes |
| 623-349 | PHOENIX | 7175 | — | Yes |
| 623-352 | PHOENIX | 630E | 2022-10-04 | Yes |
| 623-356 | PHOENIX | 965H | 2020-09-24 | Yes |
| 623-362 | PHOENIX | 9636 | — | — |
| 623-363 | PHOENIX | 6010 | — | — |
| 623-373 | PHOENIX | 597F | 2026-04-20 | Yes |
| 623-374 | PHOENIX | 9636 | — | Yes |
| 623-376 | PHOENIX | 9636 | — | — |
| 623-377 | PHOENIX | 6572 | 2002-03-06 | Yes |
| 623-383 | PHOENIX | 630E | — | Yes |
| 623-385 | PHOENIX | 7552 | — | Yes |
| 623-386 | PHOENIX | 9636 | — | — |
| 623-387 | PHOENIX | 6010 | 2011-03-29 | Yes |
| 623-388 | PHOENIX | 9636 | — | Yes |
| 623-393 | PHOENIX | 9636 | — | Yes |
| 623-396 | PHOENIX | 6010 | 2011-09-01 | Yes |
| 623-398 | PHOENIX | 4793 | — | Yes |
| 623-399 | PHOENIX | 6529 | — | Yes |
| 623-400 | PHOENIX | 965H | 2020-07-14 | Yes |
| 623-401 | PHOENIX | 630E | 2018-11-01 | Yes |
| 623-404 | PHOENIX | 508J | 2017-04-28 | Yes |
| 623-411 | XXXXXXXXXX | MULT | — | — |
| 623-412 | PHOENIX | 9636 | — | — |
| 623-414 | PHOENIX | 7175 | 2006-09-12 | Yes |
| 623-418 | PHOENIX | 6010 | 2001-10-24 | — |
| 623-419 | PHOENIX | 6010 | 2012-01-30 | Yes |
| 623-428 | PHOENIX | 587F | 2010-10-20 | Yes |
| 623-432 | PHOENIX | 6529 | 2009-10-02 | Yes |
| 623-433 | PHOENIX | 6529 | 2005-09-21 | Yes |
| 623-434 | PHOENIX | 9636 | — | — |
| 623-435 | PHOENIX | 9636 | — | — |
| 623-438 | PHOENIX | 883K | 2026-08-07 | Yes |
| 623-439 | PHOENIX | 624H | 2017-07-13 | Yes |
| 623-440 | PHOENIX | 318J | 2018-05-25 | Yes |
| 623-444 | PHOENIX | 7217 | — | Yes |
| 623-445 | PHOENIX | 9636 | — | Yes |
| 623-451 | PHOENIX | 6529 | — | Yes |
| 623-455 | PHOENIX | 3285 | 2004-12-27 | Yes |
| 623-456 | PHOENIX | 490J | 2025-05-05 | Yes |
| 623-462 | PHOENIX | 630E | 2022-09-01 | Yes |
| 623-463 | PHOENIX | 9636 | — | Yes |
| 623-465 | PHOENIX | 9636 | — | — |
| 623-466 | PHOENIX | 318J | — | Yes |
| 623-469 | PHOENIX | 587F | 2017-04-27 | Yes |
| 623-471 | PHOENIX | 9636 | 2019-08-26 | Yes |
| 623-473 | PHOENIX | 6572 | 2018-10-02 | Yes |
| 623-474 | PHOENIX | 9636 | — | — |
| 623-476 | PHOENIX | 7229 | — | Yes |
| 623-478 | PHOENIX | 9636 | — | Yes |
| 623-486 | PHOENIX | 9636 | — | — |
| 623-487 | PHOENIX | 9636 | — | — |
| 623-492 | PHOENIX | 9636 | — | — |
| 623-498 | PHOENIX | 6010 | 2010-04-16 | Yes |
| 623-499 | PHOENIX | 7229 | 2015-06-15 | Yes |
| 623-500 | PHOENIX | 630E | 2013-02-05 | Yes |
| 623-505 | PHOENIX | 3285 | — | Yes |
| 623-511 | XXXXXXXXXX | MULT | — | — |
| 623-512 | PHOENIX | 7175 | — | Yes |
| 623-516 | PHOENIX | 9636 | — | — |
| 623-518 | PHOENIX | 7229 | — | Yes |
| 623-521 | PHOENIX | 6529 | — | Yes |
| 623-522 | PHOENIX | 5562 | 2015-05-29 | Yes |
| 623-523 | PHOENIX | 9636 | — | Yes |
| 623-524 | PHOENIX | 9636 | 2010-07-06 | Yes |
| 623-526 | PHOENIX | 630E | 2019-03-21 | Yes |
| 623-533 | PHOENIX | 6529 | — | Yes |
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.