Area codes in Casper, Wyoming
Casper, Wyoming uses area code 307. The main Casper area code is 307.
Area codes serving Casper
All Wyoming area codes · Is a Casper call a scam?
Nearby cities
- Cheyenne area codes
- Fort Collins area codes
- Rapid City area codes
- Loveland area codes
- Greeley area codes
- Longmont area codes
- Boulder area codes
- Brighton area codes
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.