339 Area Code: Quincy, Massachusetts

Massachusetts's 339 area code is an overlay sharing geography with the long-running 781 across the cities and towns south, north, and west of Boston. Quincy, on the bay south of the city, anchors the directory's records here. Quincy sits along the southern shore of Boston Harbor, on a stretch of rocky coastline that has supported a long granite-quarrying history (the city's stone went into Boston's Custom House and many other nineteenth-century landmarks) alongside a more recent reorientation toward financial services and healthcare. The 339 footprint reaches through the inner ring of Boston-area suburbs.

Records linked to 339 numbers in the directory often include other Massachusetts cities — Boston, Lowell, Springfield, and Worcester among them. None of those are inside the 339 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Massachusetts and addresses linked across multiple cities through routine cross-referencing in our source data. The directory currently documents 46 distinct prefixes within 339 in detail, a working subset of the prefix population the code carries.

Quincy's median household income runs well above the US figure, in line with the broader Boston-metro south-shore profile. Home values come in roughly twice the national median, the city's median age sits a touch above the US reading, and population places Quincy as one of the larger cities in eastern Massachusetts — substantial enough to anchor its own civic identity within the broader Boston metropolitan area. The 339 footprint shares those demographics with 781 because the two codes overlap geographically.