Area Code Atlas

NPA 770 activated for Atlanta suburbs

Area code 770 was activated in 1995 to serve Atlanta's suburban ring, relieving 404 due to continued growth and demand for new numbers.

NPA 770 split from 404

Area code 770 was created in 1995 when almost all of Atlanta's suburban ring was split off from area code 404. This change was prompted by rapid growth and number exhaustion in the Atlanta area.

Area code 770 split from 404

On August 1, 1995, area code 770 was assigned to Atlanta's suburbs, splitting from 404. The 404/770 boundary roughly follows Interstate 285, with 404 covering Atlanta and most suburbs inside the Perimeter and 770 covering most of the metro area outside.

NPA 770 split from 404

Area code 770 was created in December 1995 by splitting almost all of Atlanta's suburban ring from 404 to address number exhaustion caused by growth in cell phones and other devices.

Mandatory ten-digit dialing implemented in Atlanta

Mandatory ten-digit dialing was implemented in the Atlanta metropolitan area in 1996, coinciding with the Summer Olympics. Atlanta became the first U.S. city to require ten-digit dialing throughout its metro area.

Declaration of Jeopardy Situation in NPA 770 (Georgia)

Extraordinary NPA-Specific Conservation Procedures for 770 NPA (Georgia)

NANP-Overlay of 770 and 404 Numbering Plan Areas (NPA) in Georgia

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.

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.