Area Code Atlas

Area code 678 overlays 404 and 770

On January 1, 1998, area code 678 was introduced as an overlay for both area codes 404 and 770 in metro Atlanta. This required mandatory ten-digit dialing throughout the region.

Ten-digit dialing required in Atlanta metro area

Ten-digit dialing became required across the entire Atlanta metropolitan area on January 1, 1998, coinciding with the implementation of area code 678 and the overlay plan involving 404 and 770. This change ensured that all local calls within the overlay region used the full area code and number.

NPA 678 overlay introduced for Atlanta metropolitan area

On January 15, 1998, area code 678 was first assigned to customers in the Atlanta metropolitan area as an overlay to the existing 404 and 770 area codes. This overlay was implemented to provide additional numbering resources for the rapidly growing region.

NPA 678 introduced as overlay for Atlanta metro

Area code 678 was first assigned on January 15, 1998, as an overlay for the Atlanta metropolitan area, supplementing the existing 404 and 770 area codes to provide additional numbering resources. This introduction was part of a plan to address number exhaustion in the rapidly growing Atlanta region.

Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for the 678 NPA (Georgia)

NPA 470 To Overlay NPAs 404, 678, and 770 (Georgia)

NPA 470 overlay introduced

Area code 470 was added on September 2, 2001, as an overlay to the existing 404, 678, and 770 area codes in the Atlanta metropolitan area after exhaustion of 678. The new code provided additional numbering resources, with assignment of new prefixes delayed until 678 was exhausted.

Georgia PSC approves new overlay area code for Atlanta

In October 2020, the Georgia Public Service Commission approved the creation of a new overlay area code for the Atlanta metropolitan area, including codes 404, 770, 678, 470, and 943, in response to projected exhaustion of existing codes by mid-2023.

Assignment of 943 to overlay 404/470/678/770 (Georgia)

NPA 943 overlay on 404/470/678/770 announced

NPA 943 to Overlay NPA 404/470/678/770 (Georgia) supersedes PL-555

NPA 943 overlay introduced for Atlanta metro area

Area code 943 was assigned and commenced service on March 15, 2022, as a new overlay area code for the Atlanta metropolitan area, overlaying 404, 470, 678, and 770 due to projected exhaustion of central office prefixes. It provided further numbering relief for the region.