All assignees
110 prefixes in 351 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 351-900 | IPSWICH | 965H | 2020-05-08 | Yes |
| 351-911 | XXXXXXXXXX | MULT | — | — |
| 351-920 | LOWELL | 9102 | — | — |
| 351-931 | XXXXXXXXXX | 9102 | — | — |
| 351-940 | — | — | ||
| 351-950 | — | — | ||
| 351-958 | — | — | ||
| 351-959 | — | — | ||
| 351-976 | — | — | ||
| 351-999 | MANCHESTER | 892D | — | 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.