424 Area Code: Los Angeles, California

The 424 area code is an overlay layered into Greater Los Angeles's coastal and Westside footprint, sharing geography with the long-established 310. Within its reach are the same neighborhoods that sit inside 310 — Santa Monica, the South Bay communities, Beverly Hills, the airport corridor, and the part of the city of Los Angeles that runs from West LA through the coastal flats — but the 424 designation is generally newer to the numbers that carry it, having been introduced when number demand in the region outgrew a single code.

In the directory's records keyed to 424 numbers, other California cities — Anaheim, Bakersfield, Chico, Concord, and a longer list besides — frequently appear. None of those lie within the 424 footprint. Their appearance reflects the routine ways California phone numbers travel through porting, address overlap, and public-record cross-referencing that doesn't follow area-code geography. The directory currently documents 252 distinct prefixes within 424 in detail, which represents our working coverage; the live total is higher and continues to expand as the overlay fills.

Los Angeles's housing market dominates the demographic story even when narrowed to specific code footprints. Typical home values within the broader city run several times the US median, and household income sits above the national reading. The city's population places it among the most populous in the country, with the metropolitan area many times larger; median age skews a touch younger than the US figure.