| 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 |
|---|---|---|---|
| 423-896 | Hampton | Carter | Landline |
| 423-843 | Soddy Daisy | Hamilton | Landline |
| 423-739 | Shady Valley | Johnson | Landline |
| 423-737 | Johnson City | Washington | Wireless |
| 423-239 | Johnson City | Washington | Landline |
| 423-315 | Chattanooga | Hamilton | Wireless |
| 423-341 | Bristol | Sullivan | Wireless |
| 423-468 | Chattanooga | Hamilton | Landline |
| 423-480 | Kingsport | Sullivan | Wireless |
| 423-410 | Johnson City | Washington | Wireless |
| 423-845 | Bristol | Sullivan | Wireless |
| 423-652 | Bristol | Sullivan | Landline |
| 423-409 | Bulls Gap | Hawkins | Wireless |
| 423-472 | Cleveland | Bradley | Landline |
| 423-846 | Chattanooga | Hamilton | Landline |
| 423-265 | Chattanooga | Hamilton | Landline |
| 423-912 | Duff | Campbell | Wireless |
| 423-359 | Greeneville | Greene | Landline |
| 423-312 | Morristown | Hamblen | Wireless |
| 423-592 | Duff | Campbell | Wireless |