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Area code 307

Area code for all of Wyoming, United States

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.

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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. Wyoming's sparse population has not required more than one area code for the state. As of May 2025, it was one of only eleven states with only one area code. 307 is not expected to be exhausted until 2050 by current projections.

Text: Wikipédia, CC BY-SA 4.0. · Image: Wikimedia Commons (Public domain) ·

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