678 Area Code: Cities, Time Zone and Zip Codes
What area code is 678? The area code 678 is located in Georgia and it serves Atlanta, Sandy Springs, Roswell, Johns Creek, Alpharetta, Marietta, Smyma, Dunwoody, North Atlanta, Mableton, Peachtree City, and some other surrounding cities. Area code 678 was created from area code 770 on November 21, 1997 and was first put to use