When the North American Numbering Plan was created in October 1947, all of Georgia was served by area code 404. In 1954, 404 was reduced to the northern half of the state, with See more

Numbering plan area 770 completely surrounds 404. The two plan areas are separated roughly by Interstate 285, known locally as the Perimeter. Generally, 770 includes most of … See more

• List of Georgia area codes
• List of North American Numbering Plan area codes
• See more