| Area Code | 865 |
| State | Tennessee |
| Current Time in Area Code 865 | 865> EDT |
| Timezone | Eastern Daylight Time |
| Regional Market Area | Knoxville Area |
| Metro Area(s) | Knoxville, TN Sevierville, TN |
| Population (2020) | 996056 |
| Adjacent Area Codes | 423,828,931 |
| Overlay Area Codes | 423 |
| Anderson County |
| Blount County |
| Grainger County |
| Jefferson County |
| Knox County |
| Loudon County |
| Roane County |
| Sevier County |
| Union County |