T-MOBILE USA, INC.
58 prefixes in 310 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 310-213 | CMTN GRDN | 6529 | — | Yes |
| 310-227 | EL SEGUNDO | 6529 | 2001-05-03 | Yes |
| 310-272 | BEVERLYHLS | 6529 | — | Yes |
| 310-290 | BEVERLYHLS | 6529 | 2020-12-11 | Yes |
| 310-307 | W ANGELES | 6529 | 2012-10-02 | Yes |
| 310-310 | SNMN SNMN | 6529 | 2006-11-07 | Yes |
| 310-345 | CMTN GRDN | 6529 | — | Yes |
| 310-346 | CMTN GRDN | 6529 | — | Yes |
| 310-359 | MALIBU | 6529 | — | Yes |
| 310-400 | CMTN GRDN | 6529 | — | Yes |
| 310-404 | CMTN GRDN | 6529 | — | Yes |
| 310-421 | REDONDO | 6529 | — | Yes |
| 310-430 | SNMN SNMN | 6529 | 2002-09-06 | Yes |
| 310-438 | CMTN CMTN | 6529 | — | Yes |
| 310-462 | INGLEWOOD | 6529 | 2002-02-22 | Yes |
| 310-493 | CMTN GRDN | 6529 | — | Yes |
| 310-497 | BEVERLYHLS | 6529 | — | Yes |
| 310-505 | CMTN GRDN | 6529 | — | Yes |
| 310-554 | CMTN CMTN | 6529 | 2017-01-16 | Yes |
| 310-561 | TORRANCE | 6529 | 2005-02-22 | Yes |
| 310-590 | INGLEWOOD | 6529 | — | Yes |
| 310-594 | CMTN GRDN | 6529 | — | Yes |
| 310-619 | TORRANCE | 6529 | — | Yes |
| 310-621 | CULVERCITY | 6529 | — | Yes |
| 310-628 | SNMN SNMN | 6529 | — | Yes |
| 310-634 | TORRANCE | 6529 | — | Yes |
| 310-654 | INGLEWOOD | 6529 | 2004-11-08 | Yes |
| 310-678 | CMTN GRDN | 6529 | — | Yes |
| 310-684 | SAN PEDRO | 6529 | — | Yes |
| 310-686 | INGLEWOOD | 6529 | — | Yes |
| 310-703 | INGLEWOOD | 6529 | 2005-05-10 | Yes |
| 310-704 | CMTN GRDN | 6529 | — | Yes |
| 310-709 | W ANGELES | 6529 | — | Yes |
| 310-714 | CMTN GRDN | 6529 | — | Yes |
| 310-722 | CMTN GRDN | 6529 | — | Yes |
| 310-757 | CMTN CMTN | 6529 | 2024-02-14 | Yes |
| 310-770 | BEVERLYHLS | 6529 | — | Yes |
| 310-774 | MALIBU | 6529 | — | Yes |
| 310-809 | SAN PEDRO | 6529 | — | Yes |
| 310-863 | REDONDO | 6529 | — | Yes |
| 310-867 | BEVERLYHLS | 6529 | — | Yes |
| 310-872 | SAN PEDRO | 6529 | — | Yes |
| 310-876 | CULVERCITY | 6529 | — | Yes |
| 310-901 | TORRANCE | 6529 | — | Yes |
| 310-902 | SNMN MRVS | 6529 | 2001-08-22 | Yes |
| 310-910 | INGLEWOOD | 6529 | — | Yes |
| 310-920 | CMTN GRDN | 6529 | 2001-10-18 | — |
| 310-925 | BEVERLYHLS | 6529 | 2001-12-26 | Yes |
| 310-927 | BEVERLYHLS | 6529 | — | Yes |
| 310-936 | CULVERCITY | 6529 | 2001-02-28 | Yes |
| 310-947 | REDONDO | 6529 | 2002-06-14 | Yes |
| 310-951 | TORRANCE | 6529 | 2002-08-21 | — |
| 310-980 | SNMN SNMN | 6529 | 2002-02-21 | — |
| 310-982 | SAN PEDRO | 6529 | 2005-08-30 | Yes |
| 310-985 | SNMN SNMN | 6529 | 2002-10-17 | Yes |
| 310-986 | LOMITA | 6529 | 2005-01-03 | Yes |
| 310-987 | SAN PEDRO | 6529 | 2005-02-14 | Yes |
| 310-999 | CMTN GRDN | 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.