T-MOBILE USA, INC.
84 prefixes in 520 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 520-213 | CASAGRANDE | 6529 | 2013-06-25 | Yes |
| 520-220 | SIERRAVIST | 6529 | 2002-05-31 | Yes |
| 520-227 | SIERRAVIST | 6529 | 2002-05-16 | Yes |
| 520-234 | SIERRAVIST | 6529 | 2002-11-06 | Yes |
| 520-238 | YUMA | 6529 | — | Yes |
| 520-244 | TUCSON | 6529 | 2016-03-14 | Yes |
| 520-245 | TUCSON | 6529 | — | — |
| 520-248 | TUCSON | 6529 | — | Yes |
| 520-249 | SIERRAVIST | 6529 | — | Yes |
| 520-250 | TUCSON | 6529 | — | Yes |
| 520-251 | CASAGRANDE | 6529 | — | Yes |
| 520-252 | CASAGRANDE | 6529 | — | Yes |
| 520-256 | TUCSON | 6529 | 2001-01-29 | Yes |
| 520-257 | TUCSON | 6529 | 2014-08-19 | Yes |
| 520-265 | BENSON | 6529 | 2002-08-09 | Yes |
| 520-266 | SIERRAVIST | 6529 | 2002-08-09 | Yes |
| 520-270 | TUCSON | 6529 | — | — |
| 520-271 | TUCSON | 6529 | — | Yes |
| 520-274 | TUCSON | 6529 | 2016-09-14 | Yes |
| 520-280 | CASAGRANDE | 6529 | — | Yes |
| 520-283 | TUCSON | 6529 | 2014-09-23 | Yes |
| 520-286 | TUCSON | 6529 | 2013-01-11 | Yes |
| 520-313 | NOGALES | 6529 | 2001-05-15 | Yes |
| 520-331 | TUCSON | 6529 | — | — |
| 520-332 | TUCSON | 6529 | 2012-05-17 | Yes |
| 520-365 | TUCSON | 6529 | 2012-04-24 | Yes |
| 520-370 | TUCSON | 6529 | — | Yes |
| 520-373 | TUCSON | 6529 | 2012-10-31 | Yes |
| 520-380 | CASAGRANDE | 6529 | 2019-08-23 | Yes |
| 520-390 | TUCSON | 6529 | — | Yes |
| 520-401 | TUCSON | 6529 | — | Yes |
| 520-402 | BENSON | 6529 | 2016-09-14 | Yes |
| 520-427 | TUCSON | 6529 | 2013-01-11 | Yes |
| 520-435 | WILLCOX | 6529 | 2023-05-31 | Yes |
| 520-440 | TUCSON | 6529 | — | — |
| 520-443 | TUCSON | 6529 | 2007-06-06 | Yes |
| 520-450 | CASAGRANDE | 6529 | — | Yes |
| 520-460 | TUCSON | 6529 | 2012-09-17 | Yes |
| 520-470 | NOGALES | 6529 | — | Yes |
| 520-473 | SIERRAVIST | 6529 | 2020-11-23 | Yes |
| 520-474 | TUCSON | 6529 | 2012-11-16 | Yes |
| 520-479 | TUCSON | 6529 | 2020-05-11 | Yes |
| 520-481 | TUCSON | 6529 | — | — |
| 520-491 | FLAGSTAFF | 6529 | — | Yes |
| 520-499 | TUCSON | 6529 | 2013-04-19 | Yes |
| 520-504 | SIERRAVIST | 6529 | 2021-04-02 | Yes |
| 520-534 | TUCSON | 6529 | 2021-01-11 | Yes |
| 520-535 | TUCSON | 6529 | 2020-12-08 | Yes |
| 520-543 | TUCSON | 6529 | 2021-05-14 | Yes |
| 520-553 | CASAGRANDE | 6529 | 2021-07-19 | Yes |
| 520-556 | SIERRAVIST | 6529 | 2021-08-24 | Yes |
| 520-596 | TUCSON | 6529 | 2021-10-26 | Yes |
| 520-619 | NOGALES | 6529 | 2001-05-15 | Yes |
| 520-631 | TUCSON | 6529 | — | Yes |
| 520-634 | CASAGRANDE | 6529 | 2022-03-10 | Yes |
| 520-635 | CASAGRANDE | 6529 | 2015-04-07 | Yes |
| 520-637 | CASAGRANDE | 6529 | 2020-12-23 | Yes |
| 520-658 | TUCSON | 6529 | 2014-10-24 | Yes |
| 520-660 | CASAGRANDE | 6529 | 2022-09-20 | Yes |
| 520-661 | TUCSON | 6529 | — | Yes |
| 520-701 | CASAGRANDE | 6529 | 2023-11-09 | Yes |
| 520-728 | CASAGRANDE | 6529 | 2024-02-16 | Yes |
| 520-757 | CASAGRANDE | 6529 | 2025-03-25 | Yes |
| 520-763 | CASAGRANDE | 6529 | 2025-07-11 | Yes |
| 520-764 | CASAGRANDE | 6529 | 2025-10-28 | Yes |
| 520-765 | CASAGRANDE | 6529 | 2026-01-09 | Yes |
| 520-788 | CASAGRANDE | 6529 | 2014-09-22 | Yes |
| 520-789 | TUCSON | 6529 | 2012-02-24 | Yes |
| 520-831 | PRESCOTT | 6529 | — | Yes |
| 520-839 | NOGALES | 6529 | — | Yes |
| 520-861 | TUCSON | 6529 | — | Yes |
| 520-869 | TUCSON | 6529 | — | Yes |
| 520-870 | TUCSON | 6529 | — | Yes |
| 520-891 | TUCSON | 6529 | — | — |
| 520-921 | SEDONA | 6529 | — | Yes |
| 520-940 | TUCSON | 6529 | — | Yes |
| 520-965 | TUCSON | 6529 | 2015-01-02 | Yes |
| 520-971 | TUCSON | 6529 | — | Yes |
| 520-977 | TUCSON | 6529 | — | Yes |
| 520-979 | TUCSON | 6529 | — | Yes |
| 520-981 | TUCSON | 6529 | — | Yes |
| 520-982 | TUCSON | 6529 | — | Yes |
| 520-990 | TUCSON | 6529 | — | Yes |
| 520-991 | TUCSON | 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.