Yellowstone County · Montana
Billings, MT area codes and time zone
Quick answer
Billings is served by area code 406, keeps MST time (GMT-7), and sits in county FIPS 30111.
- Area code
- 406Within 25 miles of the city centre
- Time zone
- MSTAmerica/Denver
- UTC offset
- GMT-7MDT in summer (UTCGMT-6)
- County FIPS
- 30111Yellowstone County
Dialling from and to Billings
What this means when you pick up the phone.
Local calls inside 406 may still work on seven digits, but ten-digit dialling is the safe default everywhere in the country now. From abroad, dial +1 then the ten digits.
How Billings came to have one area code
Why one city can carry several codes.
Area codes are assigned to geography, then exhausted as demand grows. Billings — population about 121k — is covered by code 406, drawn from within 25 miles of the city centre. A single code still has enough numbers for the area, so no overlay has been needed yet. When growth exhausts it, regulators will layer on a new code and local calls will move to ten digits.
More Billings data
Other Billings datasets on this site.
- Billings population and income
- Billings sales tax rate
- Billings property tax
- Billings cost of living
- Billings home values and rent
- Billings crime rates
- Billings public schools
- Billings weather normals
- Billings commute times
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