The number "801" can refer to various things depending on the context. In mathematics, it is simply an integer that follows 800 and precedes 802. It is an odd number and can be factored into prime numbers as 3 × 267. In area codes, 801 is the telephone area code for the state of Utah in the United States. This area code covers a significant portion of the state, including the capital city, Salt Lake City. It was established in 1947 and is one of the original area codes assigned in North America.