| 423 | Tennessee (Two disconnected portions of East Tennessee-Bristol, Johnson City, Kingsport in north; Chattanooga, Cleveland in south), split from 615 More information at: Area Code 423 Phone Number Blocks |
| 615 | Tennessee (Nashville, Murfreesboro, Springfield, Lebanon, Dickson and north central Tennessee), split from 901 in 1954. More information at: Area Code 615 Phone Number Blocks |
| 731 | Tennessee (West Tennessee excluding greater Memphis: Union City, Jackson, Dyersburg, Martin, Brownsville, Paris, Bolivar), split from 901 More information at: Area Code 731 Phone Number Blocks |
| 865 | Tennessee (Knoxville, Gatlinburg, Newport, Jefferson City, Oak Ridge, Rockwood and central East Tennessee), split from 423 in 1999. 865 one of many vanity area codes, is reference as 'VOL' representing Tennessee as the volunteer state. More information at: Area Code 865 Phone Number Blocks |
| 901 | Tennessee (Memphis, Covington, Somerville and extreme southwestern Tennessee). Originally for the entire state. More information at: Area Code 901 Phone Number Blocks |
| 931 | Tennessee (Middle Tennessee, excluding Greater Nashville: Clarksville, Columbia, Manchester, Cookeville), split from 615 More information at: Area Code 931 Phone Number Blocks |
