| 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 |
|---|---|---|---|
| 423-491 | Johnson City | Washington | Landline |
| 423-553 | Chattanooga | Hamilton | Landline |
| 423-349 | Kingsport | Sullivan | Landline |
| 423-568 | Niota | Mcminn | Landline |
| 423-225 | Benton | Polk | Landline |
| 423-953 | Johnson City | Washington | Landline |
| 423-771 | Chattanooga | Hamilton | Landline |
| 423-802 | Chattanooga | Hamilton | Wireless |
| 423-810 | Bradley | Bradley | - |
| 423-612 | Bristol | Sullivan | Wireless |
| 423-483 | Johnson City | Washington | Landline |
| 423-761 | Turtletown | Polk | Landline |
| 423-725 | Hampton | Carter | Landline |
| 423-399 | Jacksboro | Campbell | Wireless |
| 423-242 | Chattanooga | Hamilton | Landline |
| 423-464 | Cleveland | Bradley | Wireless |
| 423-505 | Chattanooga | Hamilton | Landline |
| 423-484 | Bristol | Sullivan | Landline |
| 423-274 | Bristol | Sullivan | Landline |
| 423-637 | Chattanooga | Hamilton | Wireless |