CHARTER IP ENABLED SERVICES, LLC
26 prefixes in 406 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 406-300 | KALISPELL | 792K | 2013-07-17 | Yes |
| 406-307 | CANYON CRK | 792K | 2025-03-18 | Yes |
| 406-309 | KALISPELL | 792K | 2011-07-01 | Yes |
| 406-319 | POLSON | 792K | — | Yes |
| 406-330 | CLINTON | 792K | — | Yes |
| 406-393 | SOMERS | 792K | 2006-03-30 | Yes |
| 406-404 | BOZEMAN | 792K | 2012-04-03 | Yes |
| 406-415 | DEER LODGE | 792K | 2010-04-09 | Yes |
| 406-420 | BIGFORK | 792K | 2006-02-28 | Yes |
| 406-422 | HELENA | 792K | — | Yes |
| 406-493 | MISSOULA | 792K | — | Yes |
| 406-502 | HELENA | 792K | 2012-04-03 | Yes |
| 406-513 | HELENA | 792K | 2008-04-08 | Yes |
| 406-534 | BILLINGS | 792K | — | Yes |
| 406-571 | FINLEY PT | 792K | — | Yes |
| 406-702 | BILLINGS | 792K | 2012-03-07 | Yes |
| 406-709 | LAKESIDE | 792K | — | Yes |
| 406-730 | WHITEFISH | 792K | — | Yes |
| 406-830 | MISSOULA | 792K | 2007-02-06 | Yes |
| 406-839 | BILLINGS | 792K | 2006-09-30 | Yes |
| 406-845 | CUT BANK | 792K | 2008-10-27 | Yes |
| 406-890 | KALISPELL | 792K | — | Yes |
| 406-897 | COLUMBIFLS | 792K | — | Yes |
| 406-898 | BOZEMAN | 792K | 2009-03-20 | Yes |
| 406-926 | MISSOULA | 792K | 2011-01-07 | Yes |
| 406-996 | HELENA | 792K | 2011-01-10 | 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.