The area code 610 is located in Allentown, Pennsylvania.
Area code 610 serves Allentown, Pennsylvania, and a wide stretch of southeastern PA outside Philadelphia. It anchors the Lehigh Valley and reaches into the Reading area and the western and northern Philly suburbs. Established in 1994 after a split from 215, it became the primary area code for Allentown, Bethlehem, and Easton. Today, 610 phone numbers are common for local businesses, schools, and homes across the region.
Major cities and landmarks covered by 610 include:
To meet demand, the 610 numbering plan area uses the 484 overlay (introduced in 1999), so 10-digit dialing is required for local calls. New numbers may be assigned with 484, but they cover the same communities as 610. The area spans much of Berks, Chester, Delaware, Lehigh, and Northampton counties, plus parts of Montgomery and Bucks, making it a key link between the Lehigh Valley and the broader Philadelphia metro.
Allentown offers well-known attractions like Dorney Park & Wildwater Kingdom and the Liberty Bell Museum, while nearby Bethlehem is known as “Christmas City.” Easton’s Crayola Experience and Reading’s hilltop Pagoda are popular regional landmarks, all reachable within the 610/484 calling area. If you see a 610 phone number, it most often points to Allentown, the Lehigh Valley, or the Philadelphia suburbs just outside the city.
Statistic: Allentown is Pennsylvania’s third-largest city (U.S. Census Bureau).