Appalachian Power is a subsidiary of American Electric Power of Columbus, Ohio. It is based in Charleston, West Virginia and owns the rights to Appalachian Power Park in Charleston. AP serves about 1 million customers in its territory, which includes parts of central and Southern West Virginia, Southwest Virginia and parts of Northeast Tennessee, specifically Kingsport.
Appalachian's Tennessee operations are technically and legally considered to be that of the Kingsport Power Company. The Kingsport Power name is rarely used anymore and is more for just regulatory formality, as AEP considers Appalachian Power to be the operating company in Tennessee.