Laramie County · Wyoming
Cheyenne, WY area codes and time zone
Quick answer
Cheyenne is served by area code 307, keeps MST time (GMT-7), and sits in county FIPS 56021.
- Area code
- 307Within 25 miles of the city centre
- Time zone
- MSTAmerica/Denver
- UTC offset
- GMT-7MDT in summer (UTCGMT-6)
- 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.
How Cheyenne came to have one area code
Why one city can carry several codes.
Area codes are assigned to geography, then exhausted as demand grows. Cheyenne — population about 65k — is covered by code 307, 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 Cheyenne data
Other Cheyenne datasets on this site.
- Cheyenne population and income
- Cheyenne sales tax rate
- Cheyenne property tax
- Cheyenne cost of living
- Cheyenne home values and rent
- Cheyenne crime rates
- Cheyenne public schools
- Cheyenne weather normals
- Cheyenne commute times
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