Geographic Regions and Area Codes

Area code 484 is located in Pennsylvania and covers a broad geographical region, including parts of the eastern and southeastern parts of the state. It encompasses numerous cities and towns, such as Allentown, Bethlehem, Reading, and Norristown. The area code also includes regions to the west of Philadelphia and much of the Delaware Valley, including almost all of Delaware County and the Lehigh Valley. This area code is an overlay for the 610 area code, introduced in 1999. It is part of the North American Numbering Plan (NANP) and is associated with other area codes such as 835, 215, and 267 in the vicinity of Philadelphia.