T-MOBILE USA, INC.
4 prefixes in 283 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 283-218 | CLERMONT | 6529 | 2024-02-20 | Yes |
| 283-219 | HAMILTON | 6529 | 2024-02-20 | Yes |
| 283-225 | HAMILTON | 6529 | 2024-09-09 | Yes |
| 283-234 | CLERMONT | 6529 | 2025-04-03 | 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.