U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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California ZIP Codes

Complete postal directory, details, and geographic map for the State of California.

State ZIP Code City County Area Codes
CA 94011 Burlingame San Mateo County 650
CA 94013 Daly City San Mateo County 650
CA 94014 Daly City San Mateo County 415, 628, 650
CA 94015 Daly City San Mateo County 415, 628, 650
CA 94016 Daly City San Mateo County 650
CA 94017 Daly City San Mateo County 650
CA 94018 El Granada San Mateo County 650
CA 94019 Half Moon Bay San Mateo County 650
CA 94020 La Honda San Mateo County 650, 831
CA 94021 Loma Mar San Mateo County 650, 831
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.