in 1995 Atlanta added the area code 770 to the existing 404 area code. This meant that to call any number you must dial all 10 digits. Before this time you did not need to dial an area code to call within Metro Atlanta. In 1998 they added the area code 678. In 2010 Atlanta added the area code 470. What could have caused Atlanta to need to add the area codes?
Well the easiest answer would be housing expansion cause every like block or so has a new area code to aid emergency responders to get to a said area much faster due to them knowing the area code