Area codes in Billings, Montana
Billings, Montana uses area code 406. The main Billings area code is 406.
Area codes serving Billings
Phone numbers in Billings are written as ten digits — for example (406) 555-0190 — and fall in the Mountain Time zone.
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
Frequently asked questions
What is the area code for Billings?
The main area code for Billings, Montana is 406.
How many area codes does Billings have?
Billings has 1 area code: 406.
How do you dial a Billings 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.