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 95528 Carlotta Humboldt County 707
CA 95531 Crescent City Del Norte County 707
CA 95532 Crescent City Del Norte County 707
CA 95534 Cutten Humboldt County 707
CA 95536 Ferndale Humboldt County 707
CA 95537 Fields Landing Humboldt County 707
CA 95538 Fort Dick Del Norte County 707
CA 95540 Fortuna Humboldt County 707
CA 95542 Garberville Humboldt County 707
CA 95543 Gasquet Del Norte County 458, 530, 541, 707
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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.