The area code 770 is located in Atlanta, Georgia.
Area code 770 serves the suburbs of Atlanta, Georgia, surrounding the city’s 404 core and stretching across much of the metro area in the Eastern Time Zone. Introduced in 1995 to handle rapid growth, it now forms an overlay complex with 678, 470, and 943, so 10‑digit dialing is required across metro Atlanta. The 770 region is often associated with communities outside the I‑285 “Perimeter,” reflecting Atlanta’s expansion into nearby counties. It’s a key code for businesses, schools, and neighborhoods that power the wider Atlanta economy.
Major cities and communities in area code 770 include:
Landmarks tied to 770 numbers include Truist Park and The Battery Atlanta in Cobb County, Stone Mountain Park, and the bustling Perimeter Center business district. These hubs highlight why 770 phone numbers are common for both residential lines and corporate offices. The code’s wide coverage makes it one of the most recognizable numbers in the state.
You’ll see 770 on calls and texts from the Atlanta suburbs, though number portability means a 770 phone number doesn’t always guarantee a caller’s exact location. New lines in the same region may be assigned 678, 470, or 943, but existing 770 numbers stay active. For most local dialing within the metro, plan on using the full 10 digits. This setup helps Atlanta handle continued growth while keeping connections simple.
Established: 1995 — North American Numbering Plan Administration (NANPA)
Overlay partners: 678, 470, 943 — NANPA