Learn about the 406 area code, including its location, cities, time zone, introduction date, and related area codes.
406 Area Code Details
Major Cities in the 406 Area Code
The 406 area code is associated with the following cities and communities:
- Billings
- Bozeman
- Butte
- Great Falls
- Helena
- Missoula
Where Is Area Code 406 Located?
The 406 area code serves communities in Montana. The exact communities and numbering assignments can change as telephone numbering resources are updated.
406 Area Code Time Zone
The 406 area code is associated with the Mountain time zone.
When Was 406 Area Code Introduced?
The 406 area code was introduced in 01-Jan-1947.
How to Call a 406 Area Code Number
For a call within the same numbering plan, dial the required local number according to your carrier’s dialing rules. For calls from outside the United States, use the United States country code (+1), followed by the area code and seven-digit telephone number.
406 Area Code FAQ
What state is 406 area code in?
The 406 area code is associated with Montana.
What time zone is 406 area code in?
The 406 area code is associated with Mountain.
What cities use 406 area code?
Billings|Bozeman|Butte|Great Falls|Helena|Missoula
More Questions About Area Code 406
What state is area code 406 in?
Area code 406 is associated with Montana.
What time zone is area code 406 in?
The listed time zone for area code 406 is Mountain.