North American Numbers Source-cited · ownership disclosed
Area code
724
In service
United States · since 1998

Southwestern PA

724 was created in 1998 by splitting the southwestern Pennsylvania counties surrounding Pittsburgh out of 412; it is overlaid by 878.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Southwestern PA
Type
geographic
Status
in service
In service since
1998
Projected exhaust
2072 Q2

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 724 is

Southwestern Pennsylvania surrounding Allegheny County.

Communities served wholly or partly by 724:

New CastleWashingtonGreensburgButlerUniontownSharon

Serves parts of fourteen counties incl. Armstrong, Beaver, Butler, Fayette, Greene, Indiana, Lawrence, Mercer, Washington, Westmoreland.

B · Relationships

How it relates to other codes

The codes 724 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?

Split from · 1998 412 Pittsburgh 724 split from 412 on Feb 1, 1998.
Overlay · 2001 878 Pittsburgh/SW PA (overlay) 878 overlays both 724 and 412.
What's changing. Overlaid by 878 (shared with 412); 10-digit dialing mandatory.
C · History

How 724 got here

1998-02-01
Created by split from 412.
Source: Wikipedia 724
2001-08-17
878 overlay implemented on 412 and 724.
Source: Wikipedia 724
D · Capacity

How full it is

Prefixes assigned
799
Prefixes available
1
Thousands-blocks assigned
4,125

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 724 with another code →
Sources
Wikipedia ↗
Area code 724
NumberResearch.org ↗
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.