Area codes in Casper, Wyoming
Casper, Wyoming uses area code 307. The main Casper area code is 307.
Area codes serving Casper
Phone numbers in Casper are written as ten digits — for example (307) 555-0190 — and fall in the Mountain Time zone.
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
Frequently asked questions
What is the area code for Casper?
The main area code for Casper, Wyoming is 307.
How many area codes does Casper have?
Casper has 1 area code: 307.
How do you dial a Casper number?
Dial all 10 digits — the area code (307) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.