| 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 |
|---|---|---|---|
| 423-973 | Hancock | Sneedville, TN | Level 3 Communications |
| 423-975 | Washington | Johnson City, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-979 | Washington | Johnson City, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-987 | Hamilton | Chattanooga, TN | New Cingular Wireless PCS - GA |
| 423-989 | Sullivan | Bristol, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-990 | Sullivan | Bristol, TN | United Telephone-southeast-tn DBA Centurylink |
| 423-991 | Hamilton | Chattanooga, TN | New Cingular Wireless PCS - GA |
| 423-994 | Hamilton | Chattanooga, TN | New Cingular Wireless PCS - GA |
| 423-999 | Mcminn | Athens, TN | Powertel Nashville Licenses |
| 423-555 | Used in movie | Morristown, TN | Used in movie |
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.