The U.S. state of Tennessee is divided into six geographically distinct numbering plan areas (NPAs) in the North American Numbering Plan (NANP) which are serviced by a total of eight area codes.
Areacode Yearcreated ParentNPA Overlay Numbering plan area 901 1947 – – Memphis 615 1954 901 615/629 Greater Nashville, including Murfreesboro, Mount Juliet 629 2015 615 931 1997 615 – Clarksville, Columbia, Manchester, Cookeville 423 1995 615 423/729 Chattanooga, Johnson City, Kingsport, Bristol 729 2025 423 865 1999 423 – Knoxville 731 2001 901 – Jackson, Dyersburg, Union City
See also List of North American Numbering Plan area codes