Area code 770 is a telephone area code in the U.S. state of Georgia. It serves the suburbs of Atlanta and some rural areas outside the city such as Marietta, Alpharetta, Roswell, Lawrenceville, and Duluth. It was created on August 1, 1995. It was split from area code 404, which originally covered all of the Atlanta metropolitan area. It was overlaid by 678 in 1998, 470 in 2010, and 943 in 2022.
