Area Code 865 History:
Area code 865 was put into service. Area code 865 was created from a split of area code 423.
Counties in Tennessee within area code 865 include:
Anderson County, Blount County, Grainger County, Jefferson County, Knox County, Loudon County, Roane County, Sevier County, and Union County.
Major cities or places in Tennessee within area code 865 include:
Area code 865 serves the east-central area of Tennessee including the larger cities and communities of Gatlinburg, Harriman, Knoxville, Maryville, Oak Ridge, Pigeon Forge, and Sevierville in addition to many smaller communities within the area code 865 service area.