Atlanta, Georgia

Where Is Area Code 678?

Area code 678 serves Atlanta and much of the metro Atlanta region in northwestern Georgia. It is a geographic area code in the North American Numbering Plan, and it covers the same territory as area codes 404, 770, and 470. Calls with 678 numbers are common across the core of the Atlanta metropolitan area.

Area code 678 covers the City of Atlanta and many nearby cities and suburbs. These include places such as Marietta, Roswell, Sandy Springs, Decatur, Alpharetta, Smyrna, Douglasville, and Lawrenceville. It serves parts of major metro counties that include Fulton, DeKalb, Cobb, Gwinnett, Clayton, and Douglas.

The area includes many well-known places in and around Atlanta. These include Hartsfield-Jackson Atlanta International Airport, downtown Atlanta, and major corridors around Interstate 285. The region sits in the Piedmont of north Georgia and includes dense suburbs as well as major business districts.

History of Area Code 678

Area code 678 was introduced on January 15, 1998. It was first added as an overlay to area code 404 in the Atlanta area, after years of fast growth in population, business lines, fax machines, pagers, and mobile phones increased demand for new numbers.

Area code 678 later became part of a larger overlay system in metro Atlanta. Area code 770 had split from 404 in 1995 for most suburbs and exurban areas, and 678 was later overlaid on both 404 and 770. Area code 470 was added in 2010 as another overlay, and area code 943 was approved later for the same general region as number demand continued to rise.

Key Facts About Area Code 678

• Area code 678 is in the state of Georgia, and it is strongly associated with Atlanta and the surrounding metro area.
• Area code 678 is in the Eastern Time Zone and observes Eastern Standard Time and Eastern Daylight Time.
• Area code 678 is an overlay area code, not an original area code, and it began service on January 15, 1998.
• Area code 678 serves the same general numbering area as area codes 404, 770, and 470 in metropolitan Atlanta.
• Area code 678 covers one of the largest metro regions in the Southeast, including major population centers in Fulton, DeKalb, Cobb, and Gwinnett counties.
• The service area includes major institutions and landmarks such as Georgia State University, Georgia Tech, Emory University, and Hartsfield-Jackson Atlanta International Airport.
• Ten-digit dialing is required in the 678 service area because it is part of an overlay complex with multiple area codes.
• Metro Atlanta has a population of more than 6 million people, and area code 678 serves a substantial share of that broader region.

Frequently Asked Questions

What state is area code 678 in?

Area code 678 is in Georgia.

What major cities use area code 678?

Area code 678 is used in Atlanta and many nearby cities, including Marietta, Roswell, Sandy Springs, Decatur, Alpharetta, Smyrna, Douglasville, and Lawrenceville.

Is area code 678 a toll-free number?

No. Area code 678 is a geographic area code for the Atlanta, Georgia region.