| 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 |
|---|---|---|---|
| 423-367 | Sullivan | Kingsport, TN | New Cingular Wireless PCS - GA |
| 423-368 | Mcminn | Athens, TN | Cellco Partnership DBA Verizon Wireless |
| 423-369 | Morgan | Oakdale, TN | Highland Telephone Cooperative |
| 423-370 | Mcminn | Athens, TN | Alec |
| 423-371 | Monroe | Sweetwater, TN | Sprint Spectrum L.p. |
| 423-372 | Campbell | Jellico, TN | Alec |
| 423-373 | Greene | Bulls Gap, TN | Alec |
| 423-374 | Campbell | La Follette, TN | Alec |
| 423-375 | Polk | Benton, TN | Sbc Internet Services |
| 423-376 | Monroe | Madisonville, TN | Alec |
| 423-377 | Campbell | La Follette, TN | United States Cellular Corp. - Tennessee |
| 423-378 | Sullivan | Kingsport, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-379 | Cocke | Newport, TN | Alec |
| 423-380 | Bradley | Cleveld, TN | Banana Communications Ventures DBA Smart PCS |
| 423-381 | Mcminn | Athens, TN | Sprint Spectrum L.p. |
| 423-382 | Hancock | Sneedville, TN | Alec |
| 423-383 | Sullivan | Bristol, TN | Suncom DBA T-mobile Usa |
| 423-384 | Greene | Fall Branch, TN | Suncom DBA T-mobile Usa |
| 423-385 | Hamilton | Chattanooga, TN | Us Lec Of Tennessee, Inc |
| 423-386 | Hamilton | Chattanooga, TN | Bellsouth Telecomm Inc DBA South Central Bell Tel |
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.