Area Code 770 History:
Area code 770 was put into service. Area code 770 was created from a split of area code 404. In 1998 area code 770 was overlaid with area code 678 and in 2010 area code 470 was put into service as an overlay of area code 770. This resulted in an area code overlay complex of 404, 470, 678 and 770. Ten digit dialing is mandatory in area code 770.
Counties in Georgia within area code 770 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 770 include:
Area codes 470, 678 and 770 serve the portion of the Atlanta Metropolitian Area that is outside the I-285 perimeter highway which encircles Atlanta, including the larger cities and communities of Alpharetta, Atlanta, College Park, Douglasville, Duluth, Dunwoody, Forest Park, Gainesville, Griffin, Kennesaw, Lawrenceville, Mableton, Marietta, North Atlanta, Peachtree City, Redan, Roswell, Sandy Springs, Smyrna, and Tucker in addition to many smaller communities. Areas inside the I-285 perimeter highway which encircles Atlanta are assigned area codes 470, 678 and 404.