Area code 901 is an area code in the U.S. state of Tennessee. Originally it was the area code for the entire state, but now is limited to the southwest corner of the state.
Under the original assignment of area codes in 1947, area code 901 covered the entire state of Tennessee.
Splits and overlays
1954 split
In an area-code split that was a flash-cut sometime during 1954, area code 901 was restricted to the western region of Tennessee; while the eastern two-thirds of Tennessee were reassigned the 615 area code.