| 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 |
|---|---|---|---|
| 423-344 | Chattanooga | Hamilton | Landline |
| 423-400 | Chattanooga | Hamilton | Landline |
| 423-881 | Spencer | Van Buren | Landline |
| 423-727 | Mountain City | Johnson | Landline |
| 423-697 | Chattanooga | Hamilton | Landline |
| 423-617 | Athens | Mcminn | Wireless |
| 423-643 | Chattanooga | Hamilton | Landline |
| 423-616 | Morristown | Hamblen | Landline |
| 423-566 | Duff | Campbell | Landline |
| 423-642 | Chattanooga | Hamilton | Landline |
| 423-222 | Morristown | Hamblen | Landline |
| 423-658 | Whitwell | Sequatchie | Landline |
| 423-377 | Duff | Campbell | Wireless |
| 423-888 | - | - | - |
| 423-301 | South Pittsburg | Marion | Landline |
| 423-584 | Cleveland | Bradley | Wireless |
| 423-247 | Kingsport | Sullivan | Landline |
| 423-651 | Jasper | Marion | Landline |
| 423-390 | Kingsport | Sullivan | Landline |
| 423-546 | Bulls Gap | Hawkins | Landline |