A new area code was agreed upon by the Georgia Public Service Commission in October, 2020 to be added to one of the most complex overlay NPAs in the country: 404/678/470 and 770/678/470. These two NPAs cover the city of Atlanta and its surrounding metro area respectively (some example Atlanta metro area cities: Gainesville, Marietta, Sandy Springs).
The new 943 area code will, like the other two overlay codes 678 and 470, cover this entire area. Dialing arrangements will stay the same following the new area code’s activation.
The new area code’s 943 in service date: March 15, 2022.
See official NANPA planning letter (PDF document)