About Area Code 406
Area code 406 serves Montana, covering major cities including Billings, Missoula. Operating in the Mountain Time (MT), this code was established in 1947.
| State | Time Zone | Cities |
|---|---|---|
| Montana | Mountain Time (MT) | Billings, Missoula |
Active Area Code
406
Montana
Mountain Time (MT)
Est. 1947
PRIMARY
Location
Montana
Billings
ACTIVE
Coverage
2 Cities
Since 1947
Beware of Spam Calls
Scammers frequently use 406 numbers. Always verify unknown callers before sharing personal information.
Protect Yourself NowCommon Questions
Where is 406?
Located in Montana, serving Billings and surrounding areas.
What time zone?
Operates in Mountain Time (MT).
When established?
Area code 406 was introduced in 1947.
Used for spam?
Can be used by legitimate and fraudulent callers. Always verify unknown numbers.