Area code 307

Area code 307 is the telephone area code in the North American Numbering Plan for the entire U.S. state of Wyoming.

It is one of the 86 original North American area codes created by the American Telephone and Telegraph Company (AT&T) in 1947.

Because it is sparsely populated, Wyoming is one of only eleven states (as of April 8, 2020) with only one area code.

The numbering plan includes the following communities, with their respective central office codes:

Wyoming's numbering plan area and area code (blue) Area code 605 Area code 308 Area code 970 Area code 435 Area code 406 Area codes 208 and 986
Wyoming's numbering plan area and area code (blue)