T-MOBILE USA, INC.
32 prefixes in 840 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 840-207 | ARROWHEAD | 6529 | 2021-10-28 | Yes |
| 840-209 | ARROWHEAD | 6529 | 2021-08-31 | Yes |
| 840-210 | FONTANA | 6529 | 2021-12-14 | Yes |
| 840-212 | CHINO | 6529 | 2021-11-15 | Yes |
| 840-213 | REDLANDS | 6529 | 2022-08-12 | Yes |
| 840-214 | MARSHALL | 6529 | 2022-08-12 | Yes |
| 840-215 | HIGHLAND | 6529 | 2022-02-28 | Yes |
| 840-216 | ARROWHEAD | 6529 | 2022-03-01 | Yes |
| 840-217 | FONTANA | 6529 | 2022-09-02 | Yes |
| 840-219 | CALIMESA | 6529 | 2021-09-13 | Yes |
| 840-231 | POMONA | 6529 | 2023-05-31 | Yes |
| 840-232 | FONTANA | 6529 | 2023-06-09 | Yes |
| 840-233 | ARROWHEAD | 6529 | 2023-07-13 | Yes |
| 840-243 | POMONA | 6529 | 2023-10-10 | Yes |
| 840-244 | DIAMONDBAR | 6529 | 2023-10-16 | Yes |
| 840-245 | REDLANDS | 6529 | 2023-10-18 | Yes |
| 840-246 | ETIWANDA | 6529 | 2023-11-01 | Yes |
| 840-247 | HIGHLAND | 6529 | 2023-11-08 | Yes |
| 840-248 | FONTANA | 6529 | 2023-12-05 | Yes |
| 840-249 | MARSHALL | 6529 | 2023-12-07 | Yes |
| 840-250 | ARROWHEAD | 6529 | 2024-01-11 | Yes |
| 840-251 | REDLANDS | 6529 | 2024-01-19 | Yes |
| 840-252 | MENTONE | 6529 | 2022-02-28 | Yes |
| 840-253 | CALIMESA | 6529 | 2024-03-06 | Yes |
| 840-256 | UPLAND | 6529 | 2024-03-28 | Yes |
| 840-257 | COLTON | 6529 | 2024-03-28 | Yes |
| 840-260 | POMONA | 6529 | 2024-05-22 | Yes |
| 840-262 | ARROWHEAD | 6529 | 2024-07-30 | Yes |
| 840-265 | ARROWHEAD | 6529 | 2024-10-09 | Yes |
| 840-278 | ARROWHEAD | 6529 | 2025-06-18 | Yes |
| 840-281 | COLTON | 6529 | 2025-08-20 | Yes |
| 840-286 | ARROWHEAD | 6529 | 2025-11-24 | 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.