FIVE9, INC.
2 prefixes in 557 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 557-204 | ST LOUIS | 598J | 2023-05-22 | Yes |
| 557-207 | OAKVILLE | 598J | 2023-06-15 | 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.