Montana area codes
Montana has 1 area code: 406.
Area codes by city in Montana
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.
Montana has 1 area code: 406.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.