| 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 |
|---|---|---|---|
| 423-671 | Bradley | Cleveland, TN | Network Telephone Corporation |
| 423-676 | Washington | Johnson City, TN | Suncom DBA T-mobile Usa |
| 423-677 | Greene | Fall Branch, TN | Suncom DBA T-mobile Usa |
| 423-683 | Carter | Elizabethton, TN | Na Communications |
| 423-684 | Greene | Greeneville, TN | Na Communications |
| 423-685 | Washington | Johnson City, TN | Na Communications |
| 423-693 | Hamilton | Chattanooga, TN | Centurylink Communications LLC |
| 423-695 | Unicoi | Erwin, TN | Na Communications |
| 423-697 | Hamilton | Chattanooga, TN | Bellsouth Telecomm Inc DBA South Central Bell Tel |
| 423-698 | Hamilton | Chattanooga, TN | Bellsouth Telecomm Inc DBA South Central Bell Tel |
| 423-699 | Johnson | Mountain City, TN | Na Communications |
| 423-701 | Scott | Robbins, TN | United States Cellular Corp. - Tennessee |
| 423-702 | Hamilton | Chattanooga, TN | Level 3 Communications |
| 423-704 | Hamilton | Chattanooga, TN | Cricket Communications |
| 423-707 | Carter | Elizabethton, TN | New Cingular Wireless PCS - GA |
| 423-709 | Bradley | Cleveland, TN | Deltacom |
| 423-710 | Hamilton | Chattanooga, TN | Comcast Phone Of Tennessee |
| 423-714 | Hamblen | Morristown, TN | Us Lec Of Tennessee, Inc |
| 423-715 | Bradley | Cleveld, TN | Cellco Partnership DBA Verizon Wireless |
| 423-716 | Bradley | Cleveland, TN | Nuvox Communications |
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.