| 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 |
|---|---|---|---|
| 423-575 | Bluff City | Sullivan | Landline |
| 423-542 | Elizabethton | Carter | Landline |
| 423-903 | Chattanooga | Hamilton | Wireless |
| 423-799 | Grandview | Rhea | Landline |
| 423-418 | Johnson City | Washington | Wireless |
| 423-353 | Morristown | Hamblen | Landline |
| 423-754 | Rogersville | Hawkins | Wireless |
| 423-726 | Johnson City | Washington | Wireless |
| 423-923 | Rogersville | Hawkins | Wireless |
| 423-272 | Rogersville | Hawkins | Landline |
| 423-521 | Chattanooga | Hamilton | Wireless |
| 423-538 | Bluff City | Sullivan | Landline |
| 423-914 | Bristol | Sullivan | Wireless |
| 423-346 | Wartburg | Morgan | Landline |
| 423-295 | Tellico Plains | Monroe | Landline |
| 423-619 | Chattanooga | Hamilton | Wireless |
| 423-235 | Bulls Gap | Hawkins | Landline |
| 423-618 | Chattanooga | Hamilton | Wireless |
| 423-588 | Greeneville | Greene | Wireless |
| 423-939 | Jasper | Marion | Landline |