442 Area Code: Oceanside, California

The 442 code overlays Oceanside and the broader San Diego County non-metro region, sharing geography with the older 760 that has long covered the same area. Oceanside sits at the northern edge of San Diego County, where the coast bends slightly inland and the San Luis Rey River reaches the Pacific. The city's working economy has long centered on its position next to Marine Corps Base Camp Pendleton and on the strip of coastal communities that runs north toward Orange County, with a downtown pier, a harbor, and a series of beach neighborhoods shaping the urban character.

Other California cities — Anaheim, Bakersfield, Chico, Concord, and others — surface frequently in the directory's records associated with 442 numbers. None of those are inside 442's geographic footprint. The pattern follows from California's standard public-record dynamics: numbers porting between carriers, addresses linked across cities, and prior registrations that surface alongside current ones. We document 100 distinct prefixes within 442 in detail, a working subset of the active prefix population that the code actually carries.

Oceanside's home values come in well above the US median, in line with the coastal Southern California pricing pattern that has reshaped housing costs across San Diego County. Median household income runs notably above the national figure, and the city's median age is close to the US reading. Population places Oceanside as one of the larger coastal cities in San Diego County, though smaller than the city of San Diego or the inland metro centers further east.