Montana Area Codes: Complete List With Cities Served
Montana is served by 1 area code. Because the whole state shares 406, it is one of the simplest numbering setups in the country.
Montana area code list
| Area code | Main places served |
|---|---|
| 406 | Billings, Helena, Missoula and Bozeman |
Place names come from ZIP code records linked to each area code, so they show where a code is most common rather than exact boundaries.
Area codes by major city
| City | Area codes |
|---|---|
| Missoula | 406 |
| Billings | 406 |
| Great Falls | 406 |
| Helena | 406 |
| Bozeman | 406 |
| Butte | 406 |
| Absarokee | 406 |
| Acton | 406 |
| Alberton | 406 |
| Alzada | 406 |
| Anaconda | 406 |
| Angela | 406 |
| Antelope | 406 |
| Arlee | 406 |
| Ashland | 406 |
How to format a Montana phone number
US numbers have ten digits: the area code, a three-digit exchange and a four-digit line number. A Montana number is written as (406) 555-0123 for display, or +14065550123 in E.164 format for storage.
Safe numbers for testing
The range 555-0100 to 555-0199 is reserved for fictional use in every area code. Our generator combines these with real local area codes, so test data looks right without reaching a real person.
Create realistic Montana addresses for testing, with real cities, counties and ZIP codes.
Generate Montana addresses