| District of Tennessee area codes: 423 | |
|---|---|
| Country | United States |
| State/Province | Tennessee |
| Major City | Chattanooga |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 423-387 | Hamilton | Chattanooga, TN | Metro Beeper Service |
| 423-388 | Unicoi | Erwin, TN | Sprint Spectrum L.p. |
| 423-389 | Sullivan | Kingsport, TN | Cellco Partnership DBA Verizon Wireless |
| 423-390 | Sullivan | Kingsport, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-391 | Sullivan | Bluff City, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-392 | Sullivan | Kingsport, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-393 | Greene | Bulls Gap, TN | Charter Fiberlink - Tennessee |
| 423-394 | Hamilton | Chattanooga, TN | Cricket Communications |
| 423-395 | Hamilton | Chattanooga, TN | Usa Mobility Wireless |
| 423-396 | Hamilton | Apison, TN | Centurytel Ooltewah-collegedale DBA Centurylink |
| 423-398 | Sullivan | Kingsport, TN | Sprint Spectrum L.p. |
| 423-399 | Campbell | La Follette, TN | Usa Mobility Wireless |
| 423-400 | Hamilton | Chattanooga, TN | Sprint Spectrum L.p. |
| 423-401 | Hamilton | Chattanooga, TN | Us Lec Of Tennessee, Inc |
| 423-402 | Hamilton | Chattanooga, TN | Bandwidth.com Clec |
| 423-404 | Monroe | Madisonville, TN | New Cingular Wireless PCS - GA |
| 423-405 | Mcminn | Athens, TN | Sprint Spectrum L.p. |
| 423-406 | Sullivan | Kingsport, TN | Comcast Phone Of Tennessee |
| 423-407 | Mcminn | Athens, TN | Usa Mobility Wireless |
| 423-408 | Sullivan | Kingsport, TN | Teleport Communications America |
There are 610 prefixes, In the code area, the major cities are Bristol, TN;Chattanooga, TN;Cleveland, TN;East Rid. The major city is Chattanooga.