Area Code 724 – Pennsylvania
The phone area code for Pennsylvania is 724 (international format +1724). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 724
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Pennsylvania
Geographic Coverage and Jurisdiction
Area code 724 is a geographic North American Numbering Plan (NANP) code serving the western portion of the Commonwealth of Pennsylvania, United States. It was created in 1998 as a split from area code 412 to accommodate growing demand for telecommunication services in the Pittsburgh metropolitan area and surrounding counties. The numbering plan area (NPA) 724 encompasses a diverse region that includes suburban and rural communities, as well as several mid-sized cities. Key municipalities within the 724 territory include Washington, Butler, New Castle, Uniontown, Indiana, and Monessen. The code also covers portions of Allegheny County outside Pittsburgh city limits, as well as Armstrong, Beaver, Fayette, Greene, Lawrence, Mercer, Washington, and Westmoreland counties.
Dialing Formats and Procedures
For callers within the 724 area code, local calls require 10-digit dialing (area code + seven-digit local number) due to the overlay of area code 878 in the same geographic region. This overlay was introduced in 2018, making 10-digit dialing mandatory for all local calls. An example of a local call format is: 724-555-0123. For international callers, the correct format is: +1 724 555 0123, where +1 is the country code for the United States. When dialing from a mobile phone, the plus sign can be used to denote the international access code, but from a landline, the specific international prefix of the originating country must be used (e.g., 011 from the U.S., 00 from most European countries).
Overlay and Number Exhaustion
The introduction of the 878 overlay means that new telephone numbers in this region may be assigned either 724 or 878. This does not change the cost or routing of calls; all calls within the overlay area are local. However, it is essential for businesses and residents to store and dial full 10-digit numbers to ensure connectivity. The overlay was implemented to postpone the exhaustion of available numbers in the 724 area code, which had been projected to run out by 2021.
Caller Instructions
For local callers: Always dial the area code and the seven-digit number, even for calls to a neighbor. For long-distance callers within the U.S. and Canada: Dial 1 (the trunk prefix) followed by the area code and number (e.g., 1-724-555-0123). For international callers: Dial your country's exit code, then 1, then 724, then the local number. Note that calls to 724 are treated as standard domestic rates for U.S. callers; there are no premium charges unless you are calling a special service number.