406 area code
Area code 406 is in Montana, United States, in the Mountain time zone. It covers Billings, Bozeman, Butte, Great Falls, Helena, Missoula and more.
State / Province
Montana (MT)
Country
United States
Region
West
Time zone
Mountain
Current local time
—
Approx. location
46.4053, -111.5675 ↗
How to dial a 406 number
- National format
- (406) 555-0100
- International (E.164)
- +1 406 555 0100
- From abroad
- +1 406 …
Cities & areas in the 406 area code
6 known locations — a selection:
Billings
Bozeman
Butte
Great Falls
Helena
Missoula
About area code 406
Area code 406 is one of the North American Numbering Plan (NANP) codes serving Montana. In the NANP a full number looks like +1 (406) NXX-XXXX: the +1 is the country code for the US and Canada, 406 is the area code, and the remaining seven digits identify the specific line. A call is charged by your own carrier's plan, not by the area code itself.