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Fixed phone numbers in the United States, state Georgia (area code 678) are comprised of a single country code (+1), a 3 digit area code, a 3 digit local office code (or region code), and a. Area Code 678 is located in Georgia. It covers 78 cities, including Atlanta, Roswell, Alpharetta, Marietta, and Newnan. It also covers 29 counties, including Dekalb County, Fulton. Find 678 area code details including city, time zone, and map. Lookup area code 678 phone number, name, and location.
678 area code covers 37 major cities 14 counties and only one state in the United States for dialing/telecommunication purposes. The 678 area code is used by phone numbers from city of Atlanta, Sandy Springs, and Roswell in the state of Georgia. As one of the 269 US cellphone area codes, the 678 phone code.