| 423 Area Code Basic Information | |
|---|---|
| Area Code | 423 |
| Location | TN |
| Country | US |
| In Service Date | 1995-09-11 |
| Service Length | 30 years |
| Overlay Area Code? | Yes |
| Overlay Area Codes | 423 729 |
| Parent Area Code | 615 |
| Time Zone | EC |
| Map | 619 |
| Area code in jeopardy? | No |
The following section explains how to dial outbound numbers from this area code.