Area codes in Great Falls, Montana
Great Falls, Montana uses area code 406. The main Great Falls area code is 406.
Area codes serving Great Falls
Phone numbers in Great Falls are written as ten digits — for example (406) 555-0190 — and fall in the Mountain Time zone.
All Montana area codes · Is a Great Falls call a scam?
Nearby cities
- Bozeman area codes
- Missoula area codes
- Billings area codes
- Coeur d'Alene area codes
- Calgary area codes
- Idaho Falls area codes
- Pullman area codes
- Spokane area codes
Frequently asked questions
What is the area code for Great Falls?
The main area code for Great Falls, Montana is 406.
How many area codes does Great Falls have?
Great Falls has 1 area code: 406.
How do you dial a Great Falls number?
Dial all 10 digits — the area code (406) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.