Montana Area Codes
The state of Montana, USA is currently served by this single area code:
Larger Montana cities and their area codes
| City |
County | Area Codes |
| Billings | Yellowstone | 406 |
| Bozeman | Gallatin | 406 |
| Butte | Silver Bow | 406 |
| Great Falls | Cascade | 406 |
| Helena | Lewis And Clark | 406 |
| Missoula | Missoula | 406 |
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