| 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 |
|---|---|---|---|
| 423-508 | Chattanooga | Hamilton | Landline |
| 423-709 | Cleveland | Bradley | Landline |
| 423-470 | Greeneville | Greene | Wireless |
| 423-536 | Sweetwater | Monroe | Landline |
| 423-827 | Chattanooga | Hamilton | Landline |
| 423-286 | Oneida | Scott | Landline |
| 423-504 | Chattanooga | Hamilton | Landline |
| 423-526 | New Tazewell | Claiborne | Landline |
| 423-296 | Chattanooga | Hamilton | Landline |
| 423-646 | Bristol | Sullivan | Wireless |
| 423-946 | Johnson City | Washington | Wireless |
| 423-956 | Bristol | Sullivan | Wireless |
| 423-340 | Bristol | Sullivan | Wireless |
| 423-999 | Athens | Mcminn | Wireless |
| 423-747 | Johnson City | Washington | Wireless |
| 423-218 | Johnson City | Washington | Landline |
| 423-600 | Apison | Hamilton | Landline |
| 423-558 | Chattanooga | Hamilton | Landline |
| 423-535 | Chattanooga | Hamilton | Landline |
| 423-917 | Blountville | Sullivan | Landline |