Lookup area code 865 de.s: major cities and timezone. View the 865 area code map in Tennessee. Find the name of any phone number in area code 865. Area code 865 was first put in service . Currently, the largest city it serves is Knoxville, TN, and it overlaps coverage areas with area code ..Lookup People, Phone Numbers, Addresses More in Knoxville, TN. Whitepages is the largest and most trusted online phone book and directory..Run a search by name for anyone in Knoxville, Tennessee get free white pages information instantly. Knoxville, Tennessee white page directory listings include full name, phone number and address..Lookup white pages listings in Tennessee. Get phone number, address and more for anyone in Tennessee instantly!.