T-MOBILE USA, INC.
8 prefixes in 820 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 820-203 | ATASCADERO | 6529 | 2021-03-11 | Yes |
| 820-206 | PASOROBLES | 6529 | 2021-07-16 | Yes |
| 820-225 | GUADALUPE | 6529 | 2024-01-11 | Yes |
| 820-235 | VNTRA CNTL | 6529 | 2024-11-07 | Yes |
| 820-237 | ATASCADERO | 6529 | 2024-12-16 | Yes |
| 820-241 | ATASCADERO | 6529 | 2025-04-25 | Yes |
| 820-246 | ATASCADERO | 6529 | 2025-11-06 | Yes |
| 820-249 | VNTRA CNTL | 6529 | 2026-08-20 | 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.