Area Code 307 is the original area code
created in 1947 under NANP (North American Numbering Plan). The Code
307 was assigned to the entire State of Wyoming. It is still serving
the state as sole area code. The Wyoming State is least crowded state
of United States and Cheyenne is the capital of the state.
The Code is still serving whole state without any change because of the
less population and less demands for telephone lines. The Standard Time
Zone followed by area code 307 is Mountain
Time Zone. Other area codes surrounding the 307 area code are:
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