AMERICAN MESSAGING SERVICES, LLC
27 prefixes in 586 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 586-308 | ROSEVILLE | 9748 | — | — |
| 586-309 | ROSEVILLE | 9748 | — | — |
| 586-319 | WARREN | 9748 | — | — |
| 586-380 | ROMEO | 9748 | — | — |
| 586-402 | WARREN | 9748 | — | — |
| 586-406 | WARREN | 9748 | — | — |
| 586-418 | WARREN | 9748 | — | — |
| 586-450 | MT CLEMENS | 9748 | — | — |
| 586-451 | ROSEVILLE | 9748 | — | — |
| 586-485 | MT CLEMENS | 9748 | — | — |
| 586-507 | WARREN | 9748 | — | — |
| 586-568 | WARREN | 9748 | — | — |
| 586-681 | MT CLEMENS | 9748 | — | — |
| 586-704 | MT CLEMENS | 9748 | — | — |
| 586-708 | WARREN | 9748 | — | — |
| 586-717 | WARREN | 9748 | — | — |
| 586-830 | WARREN | 9748 | — | — |
| 586-831 | WARREN | 9748 | — | — |
| 586-832 | WARREN | 9748 | — | — |
| 586-856 | UTICA | 9748 | — | — |
| 586-870 | NEWBALTIMR | 9748 | — | — |
| 586-896 | WARREN | 9748 | — | — |
| 586-898 | WARREN | 9748 | — | — |
| 586-912 | WARREN | 9748 | — | — |
| 586-916 | WARREN | 9748 | — | — |
| 586-974 | WARREN | 9748 | — | — |
| 586-975 | MT CLEMENS | 9748 | — | — |
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.