T-MOBILE USA, INC.
39 prefixes in 623 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 623-202 | PHOENIX | 6529 | 2001-02-14 | Yes |
| 623-210 | PHOENIX | 6529 | — | Yes |
| 623-212 | PHOENIX | 6529 | 2023-01-11 | Yes |
| 623-213 | PHOENIX | 6529 | 2016-03-22 | Yes |
| 623-217 | PHOENIX | 6529 | — | Yes |
| 623-221 | PHOENIX | 6529 | — | Yes |
| 623-230 | PHOENIX | 6529 | 2016-04-21 | Yes |
| 623-239 | PHOENIX | 6529 | 2007-09-07 | Yes |
| 623-255 | PHOENIX | 6529 | 2007-03-16 | Yes |
| 623-261 | PHOENIX | 6529 | — | Yes |
| 623-264 | PHOENIX | 6529 | 2020-09-15 | Yes |
| 623-268 | PHOENIX | 6529 | 2021-03-25 | Yes |
| 623-272 | PHOENIX | 6529 | 2020-12-10 | Yes |
| 623-273 | PHOENIX | 6529 | 2021-07-01 | Yes |
| 623-275 | PHOENIX | 6529 | 2021-09-14 | Yes |
| 623-276 | PHOENIX | 6529 | 2022-04-22 | Yes |
| 623-280 | PHOENIX | 6529 | 2021-12-02 | Yes |
| 623-281 | PHOENIX | 6529 | 2022-01-13 | Yes |
| 623-284 | PHOENIX | 6529 | 2022-02-22 | Yes |
| 623-286 | PHOENIX | 6529 | 2022-07-14 | Yes |
| 623-290 | PHOENIX | 6529 | 2022-11-23 | Yes |
| 623-296 | PHOENIX | 6529 | 2015-03-27 | Yes |
| 623-297 | PHOENIX | 6529 | — | Yes |
| 623-320 | PHOENIX | 6529 | 2022-09-20 | Yes |
| 623-326 | PHOENIX | 6529 | — | — |
| 623-330 | PHOENIX | 6529 | — | — |
| 623-332 | PHOENIX | 6529 | — | — |
| 623-340 | PHOENIX | 6529 | — | Yes |
| 623-341 | PHOENIX | 6529 | — | Yes |
| 623-399 | PHOENIX | 6529 | — | Yes |
| 623-432 | PHOENIX | 6529 | 2009-10-02 | Yes |
| 623-433 | PHOENIX | 6529 | 2005-09-21 | Yes |
| 623-451 | PHOENIX | 6529 | — | Yes |
| 623-521 | PHOENIX | 6529 | — | Yes |
| 623-533 | PHOENIX | 6529 | — | Yes |
| 623-552 | PHOENIX | 6529 | 2008-07-23 | Yes |
| 623-570 | PHOENIX | 6529 | — | — |
| 623-628 | PHOENIX | 6529 | — | — |
| 623-703 | 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.