Area Code 678 History:
Area code 678 was put into service. Area code 678 is an overlay of area codes 404 and 770. In 2010 area code 678 was overlaid with area code 470. This resulted in an area code overlay complex of 404, 470, 678 and 770. Ten digit dialing is mandatory in area code 678.
Counties in Georgia within area code 678 include:
Barrow County, Bartow County, Butts County, Carroll County, Cherokee County, Clayton County, Cobb County, Coweta County, Dekalb County, Douglas County, Fayette County, Forsyth County, Fulton County, Gwinnett County, Hall County, Haralson County, Henry County, Jasper County, Lamar County, Meriwether County, Newton County, Oconee County, Paulding County, Pickens County, Pike County, Polk County, Rockdale County, Spalding County, and Walton County.
Major cities or places in Georgia within area code 678 include:
Area codes 470, 678 and 404 serve the city of Atlanta and the portion of the Atlanta Metropolitian Area that is inside the I-285 perimeter highway which encircles Atlanta, including the larger cities and communities of Candler-Mcafee, College Park, East Point, Forest Park, North Atlanta, Sandy Springs, and Tucker in addition to many smaller communities. Areas outside the I-285 perimeter highway which encircles Atlanta are assigned area codes 470, 678 and 770.