Knoxville, TN is currently using one area code which is area code 865. Area Code 865 was created from a split of area code 423 and was placed into service on November 1, 1999.
In addition to Knoxville, TN 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 service area.
Knoxville, TN is located in Knox County and observes the Eastern Time Zone. View our Times by Area Code tool.