NEW CINGULAR WIRELESS PCS, LLC
74 prefixes in 406 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 406-201 | FORSYTH | 6010 | 2003-01-21 | Yes |
| 406-202 | HELENA | 6010 | 2001-04-18 | Yes |
| 406-207 | MISSOULA | 6010 | 2001-04-18 | Yes |
| 406-208 | BILLINGS | 6010 | 2001-04-18 | Yes |
| 406-209 | BOZEMAN | 6010 | 2001-04-18 | Yes |
| 406-212 | KALISPELL | 6010 | 2001-04-18 | Yes |
| 406-220 | LIVINGSTON | 6010 | — | Yes |
| 406-229 | CUT BANK | 6010 | 2003-01-20 | Yes |
| 406-231 | GREATFALLS | 6010 | 2001-07-12 | Yes |
| 406-239 | MISSOULA | 6010 | — | Yes |
| 406-240 | MISSOULA | 6010 | — | — |
| 406-241 | MISSOULA | 6010 | — | Yes |
| 406-242 | THOMPSNFLS | 6010 | 2003-03-18 | Yes |
| 406-253 | KALISPELL | 6010 | — | — |
| 406-260 | KALISPELL | 6010 | — | Yes |
| 406-261 | KALISPELL | 6010 | — | Yes |
| 406-269 | ST REGIS | 6010 | 2010-10-12 | Yes |
| 406-280 | ST REGIS | 6010 | 2003-03-18 | Yes |
| 406-289 | CONRAD | 6010 | — | Yes |
| 406-305 | WHSLPHRSPG | 6010 | 2010-10-20 | Yes |
| 406-314 | KALISPELL | 6010 | 2004-10-21 | Yes |
| 406-321 | COLUMBUS | 6010 | — | Yes |
| 406-334 | LIBBY | 6010 | 2004-05-10 | Yes |
| 406-340 | LIMA | 6010 | — | Yes |
| 406-350 | LEWISTOWN | 6010 | — | Yes |
| 406-369 | HAMILTON | 6010 | — | Yes |
| 406-382 | SUPERIOR | 6010 | 2003-03-18 | Yes |
| 406-391 | CUT BANK | 6010 | — | Yes |
| 406-417 | HELENA | 6010 | 2008-05-28 | Yes |
| 406-439 | HELENA | 6010 | — | Yes |
| 406-460 | SHELBY | 6010 | — | Yes |
| 406-489 | SIDNEY | 6010 | — | Yes |
| 406-491 | BUTTE | 6010 | — | Yes |
| 406-499 | SEELEYLAKE | 6010 | 2003-03-18 | Yes |
| 406-505 | CONRAD | 6010 | 2010-10-14 | Yes |
| 406-514 | CULBERTSON | 6010 | 2010-10-20 | Yes |
| 406-515 | SUPERIOR | 6010 | 2010-10-12 | Yes |
| 406-536 | BOZEMAN | 6010 | 2024-12-18 | Yes |
| 406-539 | BOZEMAN | 6010 | — | — |
| 406-553 | DIVIDE | 6010 | — | Yes |
| 406-576 | CONRAD | 6010 | — | Yes |
| 406-580 | BOZEMAN | 6010 | — | — |
| 406-593 | BUTTE | 6010 | — | Yes |
| 406-596 | DILLON | 6010 | — | Yes |
| 406-597 | SHELBY | 6010 | — | Yes |
| 406-609 | KALISPELL | 6010 | 2021-03-24 | Yes |
| 406-610 | MISSOULA | 6010 | 2025-01-06 | Yes |
| 406-617 | BILLINGS | 6010 | 2024-12-23 | Yes |
| 406-660 | DILLON | 6010 | — | Yes |
| 406-691 | ANACONDA | 6010 | — | Yes |
| 406-699 | HARDIN | 6010 | — | Yes |
| 406-743 | LAUREL | 6010 | 2006-09-08 | Yes |
| 406-749 | COLSTRIP | 6010 | — | Yes |
| 406-790 | CULBERTSON | 6010 | — | Yes |
| 406-799 | GREATFALLS | 6010 | — | Yes |
| 406-818 | RED LODGE | 6010 | — | Yes |
| 406-824 | STIGNATIUS | 6010 | — | Yes |
| 406-850 | BILLINGS | 6010 | — | Yes |
| 406-851 | MILES CITY | 6010 | — | Yes |
| 406-855 | BILLINGS | 6010 | — | — |
| 406-860 | BILLINGS | 6010 | — | — |
| 406-861 | BILLINGS | 6010 | — | Yes |
| 406-879 | HAVRE | 6010 | 2009-11-11 | Yes |
| 406-891 | BAKER | 6010 | — | Yes |
| 406-899 | GREATFALLS | 6010 | — | — |
| 406-918 | LIBBY | 6010 | 2026-01-15 | Yes |
| 406-927 | BILLINGS | 6010 | 2010-07-23 | Yes |
| 406-940 | MOLT | 6010 | 2017-07-18 | Yes |
| 406-945 | HAVRE | 6010 | — | Yes |
| 406-949 | TOWNSEND | 6010 | — | Yes |
| 406-951 | MILES CITY | 6010 | — | Yes |
| 406-956 | BAKER | 6010 | 2010-10-20 | Yes |
| 406-989 | W GLENDIVE | 6010 | — | Yes |
| 406-990 | LAME DEER | 6010 | 2020-05-12 | 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.