| General Information about Area Code 423 | |
|---|---|
| Country | United States |
| State / Province / Territory | Tennessee |
| Major City | Chattanooga |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 423-348 | Fall Branch | Washington | Landline |
| 423-602 | Chattanooga | Hamilton | Wireless |
| 423-728 | Cleveland | Bradley | Landline |
| 423-721 | Newport | Cocke | Wireless |
| 423-219 | Turtletown | Polk | Landline |
| 423-451 | Bakewell | Hamilton | Landline |
| 423-591 | Chattanooga | Hamilton | Landline |
| 423-628 | Sunbright | Morgan | Landline |
| 423-704 | Chattanooga | Hamilton | Wireless |
| 423-335 | Johnson City | Washington | Wireless |
| 423-332 | Bakewell | Hamilton | Landline |
| 423-426 | Limestone | Washington | Wireless |
| 423-325 | Blountville | Sullivan | Landline |
| 423-343 | Kingsport | Sullivan | Landline |
| 423-336 | Charleston | Bradley | Landline |
| 423-655 | Chattanooga | Hamilton | Landline |
| 423-383 | Bristol | Sullivan | Wireless |
| 423-474 | Shady Valley | Johnson | Landline |
| 423-724 | Sneedville | Hancock | Landline |
| 423-380 | Cleveland | Bradley | Wireless |