307 area code
Area code 307 is in Wyoming, United States, in the Mountain time zone. It covers Casper, Cheyenne, Gillette, Laramie and more.
State / Province
Wyoming (WY)
Country
United States
Region
West
Time zone
Mountain
Current local time
—
Approx. location
42.4023, -105.5567 ↗
How to dial a 307 number
- National format
- (307) 555-0100
- International (E.164)
- +1 307 555 0100
- From abroad
- +1 307 …
Cities & areas in the 307 area code
4 known locations — a selection:
Casper
Cheyenne
Gillette
Laramie
About area code 307
Area code 307 is one of the North American Numbering Plan (NANP) codes serving Wyoming. In the NANP a full number looks like +1 (307) NXX-XXXX: the +1 is the country code for the US and Canada, 307 is the area code, and the remaining seven digits identify the specific line. A call is charged by your own carrier's plan, not by the area code itself.