Area code 770 serves the suburban areas surrounding Atlanta, Georgia, including cities like Marietta, Roswell, Alpharetta, and Smyrna. Introduced in 1995 as a split from the original 404 area code, 770 was created to manage the explosive growth in Atlanta’s metro region. Today, it shares the same geographic region as overlay codes 678 and 470, requiring ten-digit dialing for all calls. The 770 area is known for affluent neighborhoods, corporate offices, and excellent schools, making it a key part of Greater Atlanta’s economy and culture. While 404 remains tied to the city center, 770 is associated with suburban growth, family living, and expanding business corridors.