| 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 |
|---|---|---|---|
| 423-781 | Etowah | Mcminn | Landline |
| 423-342 | Elizabethton | Carter | Wireless |
| 423-233 | Johnson City | Washington | Landline |
| 423-305 | Chattanooga | Hamilton | Landline |
| 423-381 | Athens | Mcminn | Wireless |
| 423-419 | Harrogate | Claiborne | Wireless |
| 423-876 | Chattanooga | Hamilton | Landline |
| 423-979 | Johnson City | Washington | Landline |
| 423-264 | Vonore | Monroe | Landline |
| 423-277 | Morristown | Hamblen | Wireless |
| 423-208 | Chattanooga | Hamilton | Wireless |
| 423-241 | Turtletown | Polk | Wireless |
| 423-943 | Johnson City | Washington | Wireless |
| 423-783 | Greeneville | Greene | Landline |
| 423-278 | Greeneville | Greene | Landline |
| 423-358 | Rogersville | Hawkins | Wireless |
| 423-240 | Chattanooga | Hamilton | Wireless |
| 423-710 | Chattanooga | Hamilton | Wireless |
| 423-825 | Chattanooga | Hamilton | Landline |
| 423-471 | Mountain City | Johnson | Wireless |