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.

42,735 verified records
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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 91778 San Gabriel Los Angeles County 626
CA 91780 Temple City Los Angeles County 626
CA 91784 Upland San Bernardino County 840, 909
CA 91785 Upland San Bernardino County 909
CA 91786 Upland San Bernardino County 840, 909
CA 91788 Walnut Los Angeles County 909
CA 91789 Walnut Los Angeles County 626, 840, 909
CA 91790 West Covina Los Angeles County 626
CA 91791 West Covina Los Angeles County 626, 840, 909
CA 91792 West Covina Los Angeles County 626, 840, 909
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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.