Area Code Atlas

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

Three-way split of NPA 912 creating NPAs 229 and 478 announced

NANPA issued Planning Letter PL-NANP-202 announcing that area code 912 in southern Georgia would be split into three numbering plan areas. The plan assigned 229 to southwestern Georgia and 478 to central Georgia, while 912 would be retained for the coastal and southeastern portion. The notice established the implementation framework and geographic boundaries for the new NPAs.

NPA 229 and 478 split from 912

On August 1, 2000, area code 912 was split to create area codes 229 and 478. Area code 478 was created for central Georgia, including Macon and the northern portion of the former 912 region. Area code 229 was placed into service for southwestern Georgia. Area code 912 continued to serve the Savannah and southeastern Georgia region, reducing its geographic scope.

Permissive dialing period for 912/229/478 split

Following the implementation of the 912 split, a one-year permissive dialing period began on August 1, 2000, allowing both the old and new area codes to be used for calls into the new 229 and 478 regions. This transition period lasted until August 1, 2001, with some local routes still permitting seven-digit dialing. This allowed calls to be completed using either old or new dialing patterns while customers adjusted to the new area codes, easing the changeover to the new numbering plan areas.

NPA 478 created in three-way split from 912

In 2001, area code 478 was created as part of a three-way split of area code 912. The split divided central Georgia, with 478 serving Macon and surrounding areas, while 912 and 229 covered other regions.

Area code 229 created in three-way split from 912

In 2001, area code 229 was created as part of a three-way split of area code 912. The split assigned 229 to southwestern Georgia, while 478 and 912 served other regions.

Supplemental Information NPA SPLIT 912/478/229 Georgia

Permissive dialing period ends for 912 split

Permissive dialing for the 912, 229, and 478 area codes continued until August 1, 2001, allowing callers to use either the old or new codes during the transition after the 2000 split.

Ten-digit dialing becomes mandatory in 912

Area code 912 transitioned to mandatory ten-digit dialing by October 24, 2021, due to the nationwide designation of 988 as the National Suicide Prevention Lifeline, which conflicted with existing seven-digit dialing in the region.

Overlay relief planned for NPA 912 with new code 565

An overlay complex with area code 565 was approved in May 2025 to provide relief for the 912 numbering plan area in southeastern Georgia, addressing anticipated central office code exhaustion by 2028.

Overlay complex with 565 approved for 912

The Georgia Public Service Commission approved an all-services overlay for area code 912 on May 21, 2025, introducing area code 565 to provide relief for anticipated number exhaustion projected for 2028.

Announcement of 565 overlay for 912

On June 10, 2025, the Georgia Public Service Commission announced the addition of area code 565 as an overlay for the 912 region, ensuring continued availability of new telephone numbers for southeastern Georgia.