Area codes 678 and 470, Telephone prefix for Atlanta metropolitan area, Georgia, United States
Area codes 678 and 470 are telephone prefixes serving the Atlanta metropolitan region in Georgia and covering twenty-six counties, including cities such as Sandy Springs, Roswell, and Alpharetta. They operate alongside the older 404 area code and allow calls throughout the entire region.
Georgia introduced 678 in January 1998 to address the shortage of telephone numbers in the growing metropolitan region. Regulators added 470 in September 2001 to expand the supply of numbers further.
These area codes connect over 5.6 million residents across diverse communities in the Atlanta metropolitan region, supporting local businesses and educational institutions.
Anyone calling within the metro region must always dial the ten-digit number, even if both numbers share the same area code. This requirement applies to both mobile and landline connections across all counties.
The numbering system includes Kennesaw State University, which modified numerous telephone numbers following state-mandated internal system changes.
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