Approximate service area of Area Code 502 is in red. Area code 502 serves north central Kentucky, primarily Louisville, its suburbs, and the state capital of Frankfort.Its service area encompasses the following Kentucky counties (the boundary closely, but not exactly, tracks county lines):1  Anderson County. 2  Bullitt County. 3  Carroll County.esides Louisville and Frankfort, major cities in the 502 territory include Georgetown, Shelbyville, and Bardstown. Georgetown is a long-distance call to other cities in the 502 area code, but not Lexington, which is in the 859 area code.