Zip Area Code

Area code 406

Area code 406 is a Montana area code, in service since 1947.

Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

It is in the Mountain Time zone.

State
Montana
In service since
1947
Local dialing
ten digits; dialing 1 plus ten digits also works
Time zone
Mountain Time
ZIP codes
356

Map

Map of the 406 area codeThe shaded area shows where 406 numbers are rated, with the neighboring area codes outlined around it.509308541605307208701BillingsMissoulaGreat FallsBozemanKalispellGlendiveSidneyMiles City
Approximate 406 coverage, drawn from U.S. Census ZIP code areas and NANPA rate centers. Dashed lines are state borders.

Main cities in area code 406

Overlays and neighboring area codes

Neighboring area codes: 509, 308, 541, 605, 307, 208, 701, 402.

Counties in area code 406

Towns in area code 406

And 507 more towns: every town in Montana.

Local numbers in area code 406

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