Area Code Atlas

Area code 404 created as original Georgia area code

Area code 404 was created in 1947 as one of the original North American area codes, serving the entire state of Georgia.

NPA 404 introduced for all of Georgia

Area code 404 was assigned in October 1947 as the original area code for the entire state of Georgia under the North American Numbering Plan.

NPA 912 split from 404

Area code 912 was created in 1954 when the southern half of Georgia, including Macon and points south, was split from area code 404. After this split, 404 was reduced to the northern half of the state.

Area code 912 split from 404

On July 1, 1954, area code 912 was split off from area code 404. The split reduced 404 to the northern half of Georgia, including Atlanta, Columbus, and Augusta, while 912 took over the southern portion of the state, including Savannah and Albany.

NANP-INTERCHANGEABLE CENTRAL OFFICE CODES IN 404 NPA

Interchangeable central office codes introduced in 404

On October 1, 1989, interchangeable central office codes were introduced for area code 404 to increase numbering capacity and delay the need for a split. This allowed for more central offices and required ten-digit dialing for some calls.

NANP-SPLIT OF THE 404 NUMBERING PLAN AREA (NPA) AND DIALING PROCEDURE CHANGES IN THE 912 NPA IN THE STATE OF GEORGIA

NPA 706 split from 404

Area code 706 was created in 1992 from a split of area code 404, taking most of the area outside the immediate Atlanta metropolitan region. This split was intended to relieve number shortages in North Georgia. The new code formed a horseshoe-shaped region wrapping around Atlanta and included several southern exurbs, though some of these were later returned to 404.

Area code 706 split from 404

On May 3, 1992, area code 706 was split off from area code 404. The split removed most of the old 404 territory outside metro Atlanta and assigned it to 706.

33 communities returned from 706 to 404; permissive dialing ends

On March 29, 1993, the permissive dialing period ended for 33 communities that had been transferred from area code 706 back to area code 404. This boundary change was ordered by the Georgia Public Service Commission in response to community concerns.

Atlanta exurbs returned from 706 to 404

Several fast-growing exurbs of Atlanta that had been transferred to 706 were returned to 404 in spring 1993 after complaints from residents, leaving Columbus separated from the rest of 706.

UPDATED INFORMATION ON THE GEORGIA 404/706 SPLIT AND THE CALIFORNIA 714/909 SPLIT

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.

NANP-SPLIT OF 404 (GEORGIA) NUMBERING PLAN AREA (NPA)

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.

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.

Last central office prefix assigned in area code 404

In October 2013, the last central office prefix in area code 404 was assigned to a service provider. After this date, no new prefixes were available for assignment in 404, marking the effective exhaustion of new number assignments in this code.

NANPA announces exhaustion of 404 number blocks

In November 2013, the North American Numbering Plan Administrator announced the exhaustion of available number blocks for area code 404 due to significant population growth in Atlanta.

Exhaustion of available number blocks in 404 announced

The NANPA announced on November 13, 2013, the exhaustion of available number blocks for area code 404 due to significant population growth in Atlanta.

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.