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12 prefixes in 301 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 301-304 | WALKERSVL | 318J | 2007-03-06 | Yes |
| 301-327 | WSNG238Z15 | 318J | 2006-03-09 | Yes |
| 301-328 | WSHNGTNZN3 | 318J | 2006-06-21 | Yes |
| 301-377 | LAUREL236 | 318J | — | Yes |
| 301-378 | FREDERICK | 318J | 2007-02-20 | Yes |
| 301-383 | WSNG236Z14 | 318J | — | Yes |
| 301-448 | WSHNGTNZN3 | 318J | — | Yes |
| 301-456 | WSHNGTNZN5 | 318J | — | Yes |
| 301-477 | WSNG236Z13 | 318J | — | Yes |
| 301-484 | WSHNGTNZN4 | 318J | — | — |
| 301-485 | WSHNGTNZN6 | 318J | — | Yes |
| 301-969 | BRUNSWICK | 318J | 2007-03-06 | 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.