T-MOBILE USA, INC.
23 prefixes in 641 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 641-210 | MASON CITY | 6529 | 2001-08-02 | Yes |
| 641-233 | FAIRFIELD | 6529 | 2001-05-15 | Yes |
| 641-251 | FORESTCITY | 6529 | 2005-12-31 | Yes |
| 641-255 | MASON CITY | 6529 | 2022-04-28 | Yes |
| 641-261 | TOLEDO | 6529 | 2022-04-28 | Yes |
| 641-318 | KNOXVILLE | 6529 | — | — |
| 641-328 | MARSHALLTN | 6529 | 2001-05-23 | Yes |
| 641-416 | PELLA | 6529 | — | Yes |
| 641-417 | NEWTON | 6529 | — | Yes |
| 641-455 | OTTUMWA | 6529 | 2001-02-09 | Yes |
| 641-504 | OSKALOOSA | 6529 | — | — |
| 641-510 | GRINNELL | 6529 | — | — |
| 641-517 | OSKALOOSA | 6529 | 2022-01-13 | Yes |
| 641-548 | MASON CITY | 6529 | 2018-03-06 | Yes |
| 641-657 | HAMPTON | 6529 | 2024-07-18 | Yes |
| 641-674 | CENTERVL | 6529 | 2024-07-31 | Yes |
| 641-781 | NEWTON | 6529 | — | Yes |
| 641-808 | COLO | 6529 | 2018-03-06 | Yes |
| 641-831 | NEWTON | 6529 | — | Yes |
| 641-861 | PELLA | 6529 | — | — |
| 641-903 | MASON CITY | 6529 | 2005-06-17 | Yes |
| 641-909 | LAKE MILLS | 6529 | 2006-03-24 | Yes |
| 641-991 | OSCEOLA | 6529 | 2025-03-20 | 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.