Area Code 404 January 18, 2021 allcitycodes Telephone Codes 0 Where is area code 404 located? Below you will find a list of all cities covered by area code 404 in Georgia. Alpharetta, GA Avondale Estates, GA Clarkston, GA Conley, GA Decatur, GA Forest Park, GA Pine Lake, GA Red Oak, GA Scottdale, GA