406 Area Code

Area code 406 is the area code for Montana. It is Montana's only area code.

Counties that Use 406 Area Code

Major Cities that Use 406 Area Code

All Cities & Towns that Use 406 Area Code

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Where is 406 area code?

The following map shows the coverage of 406 area code. The coverage area is shown in green.

Area code map of the entire U.S.