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Smyrna, GA is currently assigned two area codes 678 and 770. Smyrna, GA utilizes an area code overlay in which
area codes 678 and 770 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary in Smyrna because two different homes in the same geographic area can have the same
seven digit phone number but each would have a different area code. The area code overlay which is in use in Smyrna, GA today was put into service on January 6, 1998. Area code 678 also overlays area code
404 in the Atlanta area.
In addition to Smyrna, GA area codes 678 and 770 serve the major communities of Alpharetta, Atlanta, College Park, Douglasville, Duluth, Dunwoody, Forest Park, Gainesville,
Griffin, Kennesaw, Lawrenceville, Mableton, Marietta, North Atlanta, Peachtree City, Redan, Roswell, Sandy Springs, and Tucker. All of these communities including Smyrna, Ga utilize the 678 and 770 area code
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