Area code 863 is located in Florida and covers the Heartland, as well as Polk County in Central Florida. It is the only area code that serves the area. Some of the larger and more notable cities in the 863 area code include Lakeland, Winter Haven, and Haines City. The 863 area code touches 7 other counties: Polk, Highlands, Okeechobee, Hendry, DeSoto, Hardee, and Glades.