AMERICAN MESSAGING SERVICES, LLC
24 prefixes in 313 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 313-201 | DETROITZN4 | 9748 | — | — |
| 313-260 | DETROITZN5 | 9748 | — | — |
| 313-325 | DETROITZN4 | 9748 | — | — |
| 313-430 | DETROITZN1 | 9748 | — | — |
| 313-503 | DETROITZN5 | 9748 | — | — |
| 313-601 | DETROITZN5 | 9748 | — | — |
| 313-606 | DETROITZN5 | 9748 | — | — |
| 313-609 | DETROITZN5 | 9748 | — | — |
| 313-660 | DETROITZN5 | 9748 | — | — |
| 313-684 | DETROITZN4 | 9748 | — | — |
| 313-691 | DETROITZN5 | 9748 | — | — |
| 313-705 | DETROITZN5 | 9748 | — | — |
| 313-709 | DETROITZN5 | 9748 | — | — |
| 313-714 | DETROITZN5 | 9748 | — | — |
| 313-754 | DETROITZN5 | 9748 | — | — |
| 313-793 | DETROITZN4 | 9748 | — | — |
| 313-795 | DETROITZN4 | 9748 | — | — |
| 313-796 | DETROITZN4 | 9748 | — | — |
| 313-803 | DETROITZN5 | 9748 | — | — |
| 313-813 | DETROITZN4 | 9748 | — | — |
| 313-814 | DETROITZN4 | 9748 | — | — |
| 313-840 | DETROITZN5 | 9748 | — | — |
| 313-851 | DETROITZN6 | 9748 | — | — |
| 313-990 | DETROITZN5 | 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.