South region · Eastern Time, Central Time
Tennessee Area Codes
All 8 area codes serving Tennessee, the cities each one covers, and which are overlays. Tennessee is served by 8 area codes, spanning Eastern Time, Central Time.
Last updated October 3, 2026
Full list
Every Tennessee area code
Tennessee is served by 8 area codes, spanning Eastern Time, Central Time. 2 of these are overlay codes layered over busy metros; the rest are geographic codes. Eastern in Knoxville and Chattanooga; Central in Nashville, Memphis and most of the state.
| Code | Area served | Type | In service |
|---|---|---|---|
| 423 | Eastern Tennessee outside Knoxville, including Chattanooga and the Tri-Cities | Geographic | Since 1995 |
| 615 | Nashville and surrounding Middle Tennessee counties | Geographic | Since 1954 |
| 629 | Nashville and surrounding Middle Tennessee counties | Overlay | Since 2015 |
| 729 | Eastern Tennessee outside Knoxville, including Chattanooga and the Tri-Cities | Overlay | Since 2025 |
| 731 | Western Tennessee outside the Memphis area, including Jackson and Dyersburg | Geographic | Since 2001 |
| 865 | Knoxville and surrounding counties in East Tennessee | Geographic | Since 1999 |
| 901 | Memphis and Shelby County plus neighboring Tipton and Fayette counties in southwest Tennessee | Geographic | Since 1947 |
| 931 | Middle Tennessee outside the Nashville area, including Clarksville, Cookeville and Columbia | Geographic | Since 1997 |
Area codes and dialing in Tennessee
Tennessee's 8 area codes mix older geographic codes with newer overlays. The busiest metros — around Memphis, Nashville, Chattanooga — carry the most numbers and rely on overlays, which is why 10-digit dialing is required there. Quieter parts of the state may still use a single code. The oldest code in Tennessee is 901 (Memphis), one of the original 1947 area codes.
Whenever a Tennessee region runs low on numbers, a new overlay is added on top rather than splitting the map, so existing customers keep their numbers. See 10-digit dialing for what that means in practice, or the newest area codes for upcoming changes.
Tennessee city area code pages
Look up the area codes for a specific Tennessee city: Chattanooga · Nashville · Memphis · Knoxville.
Browse Tennessee another way
Explore by South region, by time zone, or jump to the city index. You can also see the complete numeric list of every US area code.
Quick answers
Tennessee area code FAQ
How many area codes does Tennessee have?
Tennessee currently has 8 area codes: 423, 615, 629, 729, 731, 865, 901, 931.
What is the main area code for Tennessee?
Tennessee has no single main code. Its original 1947 area codes were 615 and 901; today the main cities are served by 901 (Memphis), 615 (Nashville), 423 (Chattanooga), 931 (Clarksville), 865 (Knoxville).
Does Tennessee require 10-digit dialing?
Yes, in its overlay areas you must dial all 10 digits, even for local calls. Dialing all 10 digits always works, so it is the safe habit.