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41 prefixes in 405 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 405-208 | OKLA CITY | 318J | — | Yes |
| 405-256 | MUSTANG | 318J | — | Yes |
| 405-259 | NICOMAPARK | 318J | — | Yes |
| 405-261 | WHEATLAND | 318J | — | Yes |
| 405-265 | YUKON | 318J | — | Yes |
| 405-281 | CHOCTAW | 318J | — | Yes |
| 405-283 | PIEDMONT | 318J | — | Yes |
| 405-285 | EDMOND | 318J | — | Yes |
| 405-286 | BRITTON | 318J | — | Yes |
| 405-293 | GUTHRIE | 318J | — | Yes |
| 405-294 | NOBLE | 318J | — | Yes |
| 405-295 | EL RENO | 318J | — | Yes |
| 405-310 | NORMAN | 318J | — | Yes |
| 405-455 | MIDWEST CY | 318J | — | Yes |
| 405-463 | BRITTON | 318J | — | Yes |
| 405-470 | BETHANY | 318J | — | Yes |
| 405-509 | EDMOND | 318J | — | Yes |
| 405-510 | OKLA CITY | 318J | — | Yes |
| 405-513 | EDMOND | 318J | — | Yes |
| 405-522 | OKLA CITY | 318J | — | — |
| 405-600 | OKLA CITY | 318J | — | Yes |
| 405-601 | OKLA CITY | 318J | — | — |
| 405-602 | OKLA CITY | 318J | — | Yes |
| 405-603 | BETHANY | 318J | — | Yes |
| 405-604 | OKLA CITY | 318J | — | Yes |
| 405-605 | OKLA CITY | 318J | — | Yes |
| 405-606 | OKLA CITY | 318J | — | Yes |
| 405-607 | BRITTON | 318J | — | Yes |
| 405-608 | BRITTON | 318J | — | Yes |
| 405-609 | OKLA CITY | 318J | — | Yes |
| 405-610 | MIDWEST CY | 318J | — | Yes |
| 405-701 | NORMAN | 318J | — | Yes |
| 405-702 | OKLA CITY | 318J | — | Yes |
| 405-703 | MOORE | 318J | — | Yes |
| 405-726 | EDMOND | 318J | — | Yes |
| 405-759 | MOORE | 318J | — | Yes |
| 405-801 | NORMAN | 318J | — | Yes |
| 405-849 | BRITTON | 318J | — | Yes |
| 405-857 | NORMAN | 318J | 2017-09-26 | Yes |
| 405-897 | WHEATLAND | 318J | 2017-09-26 | Yes |
| 405-984 | ARCADIA | 318J | 2017-09-05 | 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.