484 Area Code: Allentown, Pennsylvania

Pennsylvania's 484 area code is an overlay sharing geography with the long-running 610 across the eastern Pennsylvania suburban corridor west and northwest of Philadelphia. Allentown — in the Lehigh Valley — anchors the directory's records here. Allentown sits along the Lehigh River in eastern Pennsylvania, organized around a downtown that has reshaped itself substantially over the past decade alongside a mix of healthcare, manufacturing, and logistics employment. The 484 designation has been filling with allocations as the broader 610 region's number demand has continued to grow.

In records the directory has compiled for 484 numbers, other Pennsylvania cities — Erie, Harrisburg, Lancaster, and New Castle — appear regularly. None of those are inside the 484 footprint. The pattern reflects standard public-record dynamics across Pennsylvania. The directory currently documents 471 distinct prefixes within 484 in detail, a working subset of the prefix population the code carries.

Allentown's home values come in below the US median, with median household income running below the national figure. The city's median age sits a few years under the US reading, and population places Allentown among the larger cities in eastern Pennsylvania — substantial enough to anchor its share of the broader Lehigh Valley metropolitan area. The 484 footprint shares those demographics with 610 because both codes serve the same broad geography in overlapping form, and the broader region reflects a long-standing mix of mid-sized cities, the surrounding manufacturing base, and the suburban corridor running west of Philadelphia through Chester and Delaware counties.