Tennessee Area Codes
7 area codes in Tennessee, United States. Country code: +1. Find area codes by city and region.
All Tennessee Area Codes
| Area Code | Major Cities | Region |
|---|---|---|
| 423 | Chattanooga, Johnson City | East |
| 615 | Nashville | Middle |
| 629 | Nashville (overlay) | Middle |
| 731 | Jackson | West |
| 865 | Knoxville | East |
| 901 | Memphis | West |
| 931 | Clarksville, Cookeville | Middle |
About Tennessee Area Codes
Tennessee uses 7 area codes under the North American Numbering Plan (NANP), serving Chattanooga, Clarksville, Cookeville, Jackson, Johnson City, Knoxville and 2 other communities. Each code follows the 3-digit format and covers a defined geographic region within the state.
Overlay Codes in Tennessee
Tennessee has adopted 1 overlay code(s): 629. An overlay assigns a new area code to the same geographic region as an existing code, so both codes serve the same area. When overlay codes are active, callers must dial all 10 digits (area code + number) even for local calls within the same region.
Major Cities and Their Area Codes
Find which area code serves each major city in Tennessee.
| City / Community | Area Code(s) |
|---|---|
| Chattanooga | 423 |
| Clarksville | 931 |
| Cookeville | 931 |
| Jackson | 731 |
| Johnson City | 423 |
| Knoxville | 865 |
| Memphis | 901 |
| Nashville | 615 |
How to Call Tennessee
Within the US: dial 1 + area code + 7-digit number (10-digit dialing applies where overlays are active).
From Canada or the Caribbean: the same NANP format applies — 1 + area code + number.
From abroad: dial your country's exit code (011 from the US, 00 from most countries, or + on mobile), then 1, then the Tennessee area code and number.
Example (from the UK): 00 1 423 XXX XXXX
Data source: North American Numbering Plan Administration (NANPA), ITU-T E.164. Area code assignments change with new overlays — verify with your carrier before dialing. NANPA