MID-RIVERS TEL. COOP., INC.
27 prefixes in 406 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 406-323 | ROUNDUP | 2246 | — | Yes |
| 406-354 | ROCK SPG | 2246 | — | — |
| 406-358 | MELSTONE | 2246 | — | — |
| 406-428 | GRASSRANGE | 2246 | — | Yes |
| 406-429 | WINNETT | 2246 | — | Yes |
| 406-464 | ROY | 2246 | — | Yes |
| 406-485 | CIRCLE | 2246 | — | Yes |
| 406-486 | FALLON | 2246 | — | — |
| 406-525 | SO WOLF PT | 2246 | — | Yes |
| 406-557 | JORDAN | 2246 | — | Yes |
| 406-568 | RYEGATE | 2246 | — | Yes |
| 406-575 | NO RYEGATE | 2246 | — | — |
| 406-583 | BLOOMFIELD | 2246 | — | — |
| 406-584 | LINDSAY | 2246 | — | Yes |
| 406-588 | CARLYLE | 2246 | — | — |
| 406-635 | TERRY | 2246 | — | Yes |
| 406-636 | LAVINA | 2246 | — | — |
| 406-687 | W GLENDIVE | 2246 | — | Yes |
| 406-772 | PLEVNA | 2246 | — | Yes |
| 406-773 | RICHEY | 2246 | — | Yes |
| 406-774 | LAMBERT | 2246 | — | Yes |
| 406-775 | EKALAKA | 2246 | — | Yes |
| 406-776 | SAVAGE | 2246 | — | — |
| 406-778 | BAKER | 2246 | — | Yes |
| 406-798 | WESTSIDNEY | 2246 | — | — |
| 406-856 | CUSTER | 2246 | — | — |
| 406-947 | MUSSELSHLL | 2246 | — | — |
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.