Laramie County · Wyoming
Cheyenne, WY area codes and time zone
Quick answer
Cheyenne is served by area code 307, keeps MST time (GMT-6), and sits in county FIPS 56021.
- Area code
- 307Within 25 miles of the city centre
- Time zone
- MSTAmerica/Denver
- UTC offset
- GMT-6MDT in summer
- County FIPS
- 56021Laramie County
Dialling from and to Cheyenne
What this means when you pick up the phone.
Local calls inside 307 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.
More on Cheyenne
Other reference data for this city.