T-MOBILE USA, INC.
4 prefixes in 464 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 464-202 | LA GRANGE | 6529 | 2022-01-11 | Yes |
| 464-239 | BLUEISLAND | 6529 | 2024-02-23 | Yes |
| 464-240 | BELLWOOD | 6529 | 2024-02-23 | Yes |
| 464-258 | CICERO | 6529 | 2025-02-12 | 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.