The original 1947 area code for Georgia, now the urban-core code for the City of Atlanta inside the I-285 perimeter. It anchors the five-code Atlanta metro overlay complex (404/470/678/770/943).
The essentialsNumbering data · NumberResearch · as of 2026-09-18
Place
Atlanta
Type
geographic
Status
in service
In service since
1947
Projected exhaust
2039 Q1
Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.
A · Where it is
Where 404 is
City of Atlanta and immediate environs, roughly the area inside Interstate 285 ("the Perimeter") in Fulton and DeKalb counties..
Communities served wholly or partly by 404:
AtlantaDecaturEast PointCollege ParkHapeville
Core urban footprint inside I-285; suburbs were split off to 770 in 1995.
B · Relationships
How it relates to other codes
The codes 404 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?
Spawned · 1954912Savannah & coastal GeorgiaSouthern Georgia (Macon southward) split off from 404 on 1954-07-01.
Spawned · 1992706Northern & eastern GeorgiaMost territory outside metro Atlanta split off from 404 on 1992-05-03.
Spawned · 1995770Atlanta suburbsAtlanta suburbs outside I-285 split off from 404 on 1995-08-01, creating the "doughnut" configuration.
Overlay · 1998678Atlanta metro (overlay)First Georgia overlay; covers same 404+770 geography.
Overlay · 2001470Atlanta metro (overlay)Overlay assigned 2001, activated 2010.
Overlay · 2022943Atlanta metro (overlay)Overlay in service 2022-03-15.
What's changing. Overlaid. Part of the five-code Atlanta metro overlay complex (404/470/678/770/943), all a single local calling area. All 404 prefixes are fully allocated.
C · History
How 404 got here
1947
Created as one of the original 86 North American area codes, serving the entire state of Georgia.
Source: Wikipedia
1954-07-01
Split: area code 912 separated for southern Georgia (Macon southward).
Source: Wikipedia
1992-05-03
Split: area code 706 took most territory outside metro Atlanta.
Source: Wikipedia
1995-08-01
Split: area code 770 took the suburban ring outside I-285; ten-digit dialing introduced.
Source: Wikipedia
1998-01-01
Overlay: area code 678 introduced over 404 and 770.
Source: Wikipedia
2001-09-02
Overlay: area code 470 assigned (activated 2010).
Source: Wikipedia
2022-03-15
Overlay: area code 943 commenced service.
Source: Wikipedia
D · Capacity
How full it is
Prefixes assigned
800
Prefixes available
0
Thousands-blocks assigned
2,609
Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).
Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.
North American Numbers