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area code

Biggest city:





Eastern (GMT -5)

Nearby area codes: 

Zip codes



Major Cities:

Atlanta, Sandy Springs, Roswell, Alpharetta, East Point, Union City, College Park, Marietta, Smyrna, Mableton, Kennesaw, Acworth, Powder Springs, and Dunwoody​​.


Average Income:





Unemployment Rate:

The 678 area code is a significant part of the telecommunications landscape in the United States, specifically within the state of Georgia. Geographical Coverage: The 678 area code is located in the state of Georgia, with Atlanta being the largest city it serves. This area code plays a crucial role in connecting various cities and counties in the region. In addition to Atlanta, it also serves other significant cities like Sandy Springs, Roswell, and John's Creek. Moreover, it encompasses several Georgian counties, including Fulton, Gwinnett, and DeKalb​​​​. Historical Context and Implementation: This area code was officially assigned on November 21st, 1997, and became active on January 6th, 1998. Classified as a General Purpose Code, it was introduced to supplement the existing network of area codes in the region. Its establishment marked a key development in the area's telecommunications infrastructure, accommodating the growing demand for phone numbers and services in the rapidly expanding Atlanta metropolitan area​​. Overlap and Dialing Pattern: The 678 area code has a notable overlap with several other area codes, namely 404, 470, and 770. This overlap indicates the extensive and intricate network of telecommunications in the Atlanta region, reflecting its status as a major urban and economic hub. For local calls within the same Numbering Plan Area (NPA), the dialing pattern requires ten digits, ensuring a consistent and streamlined calling process across the overlapping area codes​​. In conclusion, the 678 area code is a vital component of Georgia's communication network, especially in the Atlanta area. Its introduction and continued use highlight the evolving nature of telecommunication needs in one of the United States' major urban centers.
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