what area code is 770

Area code 770 is a telephone area code in the North American Numbering Plan (NANP) serving all or part of 29 counties in North Georgia, including most of Atlantas suburbs. It was created in 1995 and serves the suburbs of Atlanta, GA, including the cities of Roswell, Johns Creek, Alpharetta, Marietta, and Smyrna. The area code covers Marietta, Carrollton, Gainesville, Jonesboro, Lawrenceville, Roswell, Stone Mountain, Snellville, Cartersville, and much of north-central Georgia outside of Atlanta’s Interstate 285 Perimeter Highway.