| General Information | |
|---|---|
| Country | United States |
| State/Province | Tennessee |
| Major City | Chattanooga |
| Time Zone | Eastern (UTC-05:00) |
| Current Local Time | 05:03 |
| Prefix | County | Primary City |
|---|---|---|
| 423-200 | Hamblen | Morristown |
| 423-201 | Campbell | Jacksboro |
| 423-202 | Washington | Johnson City |
| 423-206 | Hamblen | Morristown |
| 423-207 | Washington | Johnson City |
| 423-208 | Hamilton | Chattanooga |
| 423-209 | Hamilton | Chattanooga |
| 423-210 | Monroe | Tellico Plains |
| 423-212 | Sullivan | Blountville |
| 423-213 | Washington | Johnson City |
| 423-214 | Mcminn | Englewood |
| 423-215 | Scott | Oneida |
| 423-216 | Polk | Benton |
| 423-217 | Sullivan | Bristol |
| 423-218 | Washington | Johnson City |
| 423-219 | Polk | Turtletown |
| 423-220 | Washington | Johnson City |
| 423-221 | Hamilton | Chattanooga |
| 423-222 | Hamblen | Morristown |
| 423-223 | Scott | Oneida |
| 423-224 | Sullivan | Kingsport |
| 423-225 | Polk | Benton |
| 423-226 | Hawkins | Mount Carmel |
| 423-227 | Hamilton | Chattanooga |
| 423-228 | Marion | Jasper |
| 423-229 | Sullivan | Kingsport |
| 423-230 | Sullivan | Kingsport |
| 423-231 | Hamblen | Morristown |
| 423-232 | Washington | Johnson City |
| 423-233 | Washington | Johnson City |
| 423-234 | Hawkins | Rogersville |
| 423-235 | Hawkins | Bulls Gap |
| 423-236 | Hamilton | Apison |
| 423-237 | Cocke | Newport |
| 423-238 | Hamilton | Ooltewah |
| 423-239 | Washington | Johnson City |
| 423-240 | Hamilton | Chattanooga |
| 423-241 | Polk | Turtletown |
| 423-242 | Hamilton | Chattanooga |
| 423-243 | Hamilton | Chattanooga |
| 423-244 | Bradley | Cleveland |
| 423-245 | Sullivan | Kingsport |
| 423-246 | Sullivan | Kingsport |
| 423-247 | Sullivan | Kingsport |
| 423-248 | Cocke | Newport |
| 423-249 | Claiborne | Harrogate |
| 423-252 | Mcminn | Athens |
| 423-253 | Monroe | Tellico Plains |
| 423-254 | Hamblen | Morristown |
| 423-255 | Hamilton | Chattanooga |