T-MOBILE USA, INC.
2 prefixes in 557 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 557-203 | MEHLVILLE | 6529 | 2023-05-19 | Yes |
| 557-212 | MEHLVILLE | 6529 | 2023-09-29 | 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.