This area code is split into two disconnected sections. The small section is west-central Georgia, in the region around Columbus. This is bordered by area code 334 to the west in Alabama, area code 478 to the east, area code 229 to the south, and metro Atlanta's 404, 678, 770, and future 470. It does not touch the landline area of 404, only the cellphone area.
This is the third time that the GPSC has flip-flopped on its policy for deciding how new area codes would be assigned. Metro Atlanta's suburbs were split into 770, but then both 404 and 770 were overlaid with 678, and cellphones (originally 404 only) can now have any of those no matter where in the metro area. Southern Georgia was then split three ways instead of an overlay.