Zip Area Code

Los Osos, California

Los Osos, California, in San Luis Obispo County, has ZIP codes 93402 and 93412 and area code 805, with 820 as an overlay.

ZIP codes
93402, 93412
Area codes
805, 820
Time zone
Pacific Time
Coordinates
35.3141, -120.8329

ZIP codes in Los Osos

ZIP codePost officeCountyArea codes
93402Los OsosSan Luis Obispo County805, 820
93412*Los OsosSan Luis Obispo County805, 820

* No mapped delivery area: P.O. boxes or a single organization. Area codes are those of the nearest ZIP code area.

Area codes for Los Osos

  • Area code 805

    In service since 1957. Shares its area with 820. Local calls are dialed with 1 plus ten digits.

  • Area code 820

    In service since June 30, 2018. Shares its area with 805. Local calls are dialed with 1 plus ten digits.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Los Osos is in the Pacific Time zone.

Towns near Los Osos