Geographic Regions and Area Codes in Area Code 678

Area Code 678 is located in the state of Georgia, primarily serving the Atlanta metropolitan area. This area code covers a total of 79 cities, including major ones like Atlanta, Roswell, Alpharetta, Marietta, and Newnan. The area code spans 29 counties, including prominent ones such as Fulton, DeKalb, Cobb, Clayton, and Gwinnett. Additionally, Area Code 678 has several overlays, including 404, 470, 770, and 943, which serve the same geographic area. These overlays ensure that there are sufficient numbers available to meet the demand in this densely populated and economically active region.