The area code 678 is located in Atlanta, Georgia.
Area code 678 serves the greater Atlanta, Georgia, region in north-central GA, overlaying the long-standing 404 and suburban 770 area codes. It was established in 1998 as demand for Atlanta phone numbers surged, and later joined by overlays 470 (2010) and 943 (2022), which means 10‑digit dialing is required across the metro. This overlay complex covers one of the Southeast’s largest economic hubs, connecting downtown, Midtown, and the fast-growing suburbs that ring the city.
Major communities in the 678 area code include:
The 678 area code reaches many top landmarks, such as Hartsfield–Jackson Atlanta International Airport, Mercedes-Benz Stadium, the Georgia Aquarium, Georgia Tech, Emory University, and Stone Mountain Park. Because 678 is an overlay, new phone numbers may be assigned in 678, 470, 404, or 943 anywhere in the designated Atlanta metro, regardless of county or city lines.
Area code 678 is part of the Atlanta area code story: 404 dates to 1947, 770 arrived in 1995 for the suburbs, and 678 followed in 1998 to expand numbering capacity. The region is in the Eastern Time Zone, and number portability means a 678 phone number can be moved with you, so it doesn’t always guarantee a caller’s current location. Still, seeing 678 typically signals a connection to the vibrant Atlanta metropolitan area and its core counties, including parts of Fulton, DeKalb, Cobb, Gwinnett, and Clayton.
“Atlanta’s Hartsfield–Jackson ranked as the world’s busiest airport by passengers in 2023.” — Airports Council International (ACI World)