South region · Central Time
Tennessee Area Codes
All 7 area codes serving Tennessee, the cities each one covers, and which are overlays. Tennessee is served by 7 area codes in the Central Time zone.
Last updated June 5, 2026
Full list
Every Tennessee area code
Tennessee is served by 7 area codes in the Central Time zone. 1 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 | Main city | Type | Status |
|---|---|---|---|
| 423 | Chattanooga | Geographic | In service |
| 615 | Nashville | Geographic | In service |
| 629 | Nashville | Overlay | In service |
| 731 | Jackson | Geographic | In service |
| 865 | Knoxville | Geographic | In service |
| 901 | Memphis | Geographic | In service |
| 931 | Clarksville | Geographic | In service |
Area codes and dialing in Tennessee
Tennessee's 7 area codes mix older geographic codes with newer overlays. The busiest metros — around Chattanooga, Clarksville, Jackson — 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 original code in the Tennessee list is 423 (Chattanooga).
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.
Cities with multiple area codes
These Tennessee metros are served by an overlay of two or more codes, so 10-digit dialing applies: Nashville.
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 7 area codes: 423, 615, 629, 731, 865, 901, 931.
What is the main area code for Tennessee?
The busiest metro in Tennessee is served by the 423 code. Major cities include Chattanooga, Clarksville, Jackson, Knoxville, Memphis.
Does Tennessee require 10-digit dialing?
Yes, in its overlay metros you must dial all 10 digits. Ten-digit dialing is the national standard.