Wyoming area codes
Wyoming has used a single area code, 307, since 1947. Every Wyoming number starts with it, so the code tells you the state and nothing more specific.
Updated 28 July 2026
The Wyoming area code
Wyoming uses a single area code, 307, and has done since 1947. Every Wyoming number starts with it.
Wyoming area code map
Wyoming sits in the Mountain Time zone.
Spam call reports in Wyoming
These Wyoming area codes drew the most reports to the FTC in the 30 days to 28 July 2026. The figures describe numbers displaying each code, which caller ID spoofing can fake.
Most reported Wyoming area codes · last 30 days
| Code | Primary city | Reports |
|---|---|---|
| 307 | Cheyenne | 364 |
A number listed here may itself be a spoofing victim rather than the caller. These are unverified consumer reports.
Source: FTC Do Not Call Reported Calls Data, unverified consumer reports, retrieved 28 July 2026. Request a correction.
Calls from your Wyoming numbers not landing?
Questions
How many area codes does Wyoming have?
Wyoming has 1 area code: 307.
What is the main area code for Cheyenne?
The main area code for Cheyenne is 307.
Which Wyoming area code is oldest?
Area code 307 is the oldest in Wyoming, in service since 1947.
Do I need to dial ten digits in Wyoming?
Not necessarily. Wyoming has no overlay codes, so seven-digit local dialling may still work in parts of the state.
Which Wyoming area code gets the most spam calls?
Area code 307 (Cheyenne) drew the most reports of any Wyoming code in the 30 days to 28 July 2026, with 364 numbers reported.