The state of Utah is divided into two telephone numbering plan areas in the North American Numbering Plan, which are assigned a total of three area codes, two overlay codes for the Salt Lake City area, and one code for the rest of the state.
- 801: Area code 801 is Utah's original area code, assigned to the entire state in 1947. It serves the Salt Lake City metropolitan area, including cities and communities such as American Fork, Bountiful, Kaysville, Morgan, Ogden, Orem, Provo, Salt Lake City and Spanish Fork.[1]
- 385: Overlay with 801 in 2009.
- 435: Split from 801 in 1997, encompassing all other counties in the state.