Area code 307 covers the entire state of Wyoming and has done so since its establishment in 1947. As one of the original area codes and one of the few still covering an entire state, 307 is a unique symbol of Wyoming's small population and wide-open spaces. It serves cities such as Cheyenne, Casper, Laramie, and Jackson Hole. The area code is used in everything from government services to ranching and tourism businesses. 307 is a point of pride and unity for residents across the state and remains unchanged in its service area.