770 Area Code: Cities, Time Zone and Zip Codes
What area code is 770? The area code 770 is located in Georgia and it serves Roswell, Johns Creek, Alpharetta, Marietta, Sandy Springs, Smyma, Dunwoody, Mableton, Peachtree City, Gainesville, Newman, and some other surrounding cities. The area code 770 was created from area code 678 on June 22, 1995, and was first put to use