Published: October 07, 2010
A new overlay area code was introduced by the NANPA on February 26, 2010 to cover overlay complexes 678/404 and 678/770. The new code will therefore be active for the city of Atlanta and a number of other cities such as Marietta or Sandy Springs. 10 digit dialing has been mandatory since the introduction of area code 678, so there are no changes in the way the residents of these areas will dial out.
Read NANPA announcement (in PDF format).
Visit area code 470 page for a list of cities served, map and other info.