TRIANGLE TEL. COOP. ASSN., INC.
39 prefixes in 406 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 406-292 | JOPLIN | 2257 | — | Yes |
| 406-326 | REEDPOINT | 2257 | — | — |
| 406-352 | BOX ELDER | 2257 | — | — |
| 406-353 | HARLEM | 3310 | — | Yes |
| 406-355 | RUDYARD | 2257 | — | — |
| 406-357 | CHINOOK | 2257 | — | Yes |
| 406-372 | KREMLIN | 2257 | — | — |
| 406-374 | MOORE | 3310 | — | — |
| 406-376 | GILDFORD | 2257 | — | — |
| 406-378 | BIG SANDY | 2257 | — | Yes |
| 406-379 | TURNER | 2257 | — | — |
| 406-383 | DODSON | 3310 | — | — |
| 406-386 | HOPPILLIAD | 2257 | — | — |
| 406-394 | NORTHHAVRE | 2257 | — | Yes |
| 406-395 | SOUTHHAVRE | 2257 | — | Yes |
| 406-397 | HINGHAM | 2257 | — | — |
| 406-398 | NORTHHAVRE | 2257 | — | Yes |
| 406-423 | HOBSON | 3310 | — | — |
| 406-456 | SO CHESTER | 2257 | — | — |
| 406-462 | WINIFRED | 2257 | — | — |
| 406-473 | JUDITH GAP | 3310 | — | — |
| 406-537 | MELVILLE | 2257 | — | — |
| 406-547 | WHSLPHRSPG | 3310 | — | Yes |
| 406-566 | STANFORD | 3310 | — | Yes |
| 406-567 | DENTON | 3310 | — | — |
| 406-572 | MARTINSDL | 3310 | — | — |
| 406-622 | FORTBENTON | 3310 | — | Yes |
| 406-632 | HARLOWTON | 3310 | — | Yes |
| 406-654 | MALTA | 3310 | — | Yes |
| 406-658 | SOUTHMALTA | 2257 | — | — |
| 406-663 | RAPELJE | 2257 | — | — |
| 406-667 | BROADVIEW | 2257 | — | — |
| 406-669 | MOLT | 2257 | — | — |
| 406-673 | HAYS | 2257 | — | Yes |
| 406-674 | WHITEWATER | 2257 | — | Yes |
| 406-737 | GERALDINE | 3310 | — | — |
| 406-739 | LOMA | 2257 | — | — |
| 406-759 | CHESTER | 2257 | — | Yes |
| 406-932 | BIG TIMBER | 2257 | — | 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.