Where Is Area Code 678?
Area code 678 serves Atlanta and the surrounding metropolitan area in north-central Georgia. It is a geographic area code in the South Atlantic region, and numbers using it follow Eastern Time.
The service area includes parts of Fulton, DeKalb, Cobb, Gwinnett, Clayton, Cherokee, Forsyth, Fayette, and Henry counties. Atlanta, Alpharetta, Brookhaven, Duluth, Lawrenceville, Marietta, Roswell, Sandy Springs, and Smyrna are among the communities associated with the code. Because 678 is an overlay, these communities can also have numbers using area codes 404, 470, 770, or 943.
Notable places in the wider service area include Hartsfield-Jackson Atlanta International Airport, the Georgia State Capitol, the Georgia Institute of Technology, and Stone Mountain Park. The Chattahoochee River and Stone Mountain are major geographic features of the Atlanta region.
Cities and Communities in the 678 Area Code
- Atlanta, Fulton and DeKalb counties
- Alpharetta, Fulton County
- Brookhaven, DeKalb County
- Chamblee, DeKalb County
- Cumming, Forsyth County
- Duluth, Gwinnett County
- Dunwoody, DeKalb County
- Fayetteville, Fayette County
- Forest Park, Clayton County
- Johns Creek, Fulton County
- Lawrenceville, Gwinnett County
- Lilburn, Gwinnett County
- Marietta, Cobb County
- McDonough, Henry County
- Norcross, Gwinnett County
- Peachtree City, Fayette County
- Roswell, Fulton County
- Sandy Springs, Fulton County
- Smyrna, Cobb County
- Stone Mountain, DeKalb County
- Suwanee, Gwinnett and Forsyth counties
- Tucker, DeKalb County
- Woodstock, Cherokee County
History of Area Code 678
Area code 678 entered service on January 15, 1998, as an overlay for area codes 404 and 770. Area code 770 had been created in 1995 by splitting much of Atlanta's suburban territory from area code 404. Because 678 was an overlay, it added phone number capacity without dividing the existing service areas.
Growing demand for telephone numbers in metro Atlanta led to additional overlays. Area code 470 was added in 2010, and area code 943 was added in 2022. These codes expanded number availability in the same broad region while keeping area code 678 in service.
Key Facts About Area Code 678
- Area code 678 is a geographic area code in Georgia, and Atlanta is its primary city.
- Area code 678 is located in the South Atlantic region under the U.S. Census classification.
- Area code 678 uses Eastern Time.
- Area code 678 entered service on January 15, 1998, as an overlay for area codes 404 and 770.
- Area code 678 is an overlay code, not an original area code or a traditional geographic split.
- Area code 678 shares the Atlanta region with area codes 404, 470, 770, and 943.
- Area code 678 covers parts of several counties, including Fulton, DeKalb, Cobb, Gwinnett, Clayton, Cherokee, Forsyth, Fayette, and Henry.
- Landmarks in the area include Hartsfield-Jackson Atlanta International Airport, Georgia Tech, the Georgia State Capitol, and Stone Mountain Park.
Frequently Asked Questions
What state is area code 678 in?
Area code 678 is in Georgia.
What major cities use area code 678?
Major cities with area code 678 numbers include Atlanta, Alpharetta, Brookhaven, Cumming, Duluth, Lawrenceville, Marietta, Roswell, Sandy Springs, Smyrna, and Stone Mountain.
What time zone is area code 678 in?
Area code 678 uses Eastern Time.
Is area code 678 a toll-free number?
No, area code 678 is a geographic area code, not a toll-free code.