Montana phone numbers and area codes
Montana has 1 area code and 754 assigned prefixes.
Look at a prefix's carrier mix below, or look up a full number on the home page.
- Mobile carrier 28%
- Local phone company 30%
- Internet / business phone carrier 19%
- Phone company 23%
Area codes in Montana
| Code | Area | Prefixes here |
|---|---|---|
| 406 | Montana (all) | 754 |
Biggest local calling areas
Numbers are assigned to rate centers. These have the most prefixes in Montana (the number is how many).
Billings72Missoula47Helena38Great Falls37Bozeman32Kalispell25Butte17Miles City10Sidney9Livingston8Lewistown8Hamilton8Havre7Shelby7Dillon7Hardin7Libby6Columbus6Glendive6Red Lodge6Laurel6Forsyth5Colstrip5Conrad5Anaconda5Boulder4Glasgow4Cut Bank4Townsend4Manhattan4Polson4Roundup4Belgrade4Whitefish4West Glendive4Baker4Seeley Lake3Thompson Falls3St. Regis3Pablo3Eurekarurl3Malta3Superior3Southhavre3Deer Lodge3Bigfork3Culbertson3Ronan3Terry3Wyellowstn3Fromberg3St. Ignatius3Columbia Falls3Big Timber3Big Sky3
Carriers in Montana
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| CenturyLink / Lumen | Local phone company | 158 | 21% |
| Verizon Wireless | Mobile carrier | 119 | 16% |
| AT&T Mobility | Mobile carrier | 74 | 10% |
| Onvoy | Internet / business phone carrier | 45 | 6% |
| Triangle Tel. Coop. Assn | Phone company | 39 | 5% |
| Nemont Tel Coop | Local phone company | 33 | 4% |
| Level 3 (Lumen) | Internet / business phone carrier | 27 | 4% |
| Mid-rivers Tel. Coop | Phone company | 27 | 4% |
| 3 Rivers Tel. Coop | Phone company | 26 | 3% |
| Charter / Spectrum | Internet / business phone carrier | 26 | 3% |
| Blackfoot Tel. Coop | Phone company | 22 | 3% |
| Range Tel Coop | Local phone company | 12 | 2% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.