Area codes in Billings, Montana
Billings, Montana uses area code 406. The main Billings area code is 406.
Area codes serving Billings
All Montana area codes · Is a Billings call a scam?
Nearby cities
- Bozeman area codes
- Great Falls area codes
- Casper area codes
- Idaho Falls area codes
- Missoula area codes
- Rapid City area codes
- Regina area codes
- Cheyenne area codes
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.