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 95644 Kit Carson El Dorado County 209, 350
CA 95645 Knights Landing Yolo County 279, 530, 916
CA 95646 Kirkwood Alpine County 209, 350, 530
CA 95648 Lincoln Placer County 279, 530, 916
CA 95650 Loomis Placer County 279, 530, 916
CA 95651 Lotus El Dorado County 530
CA 95652 Mcclellan Sacramento County 279, 916
CA 95653 Madison Yolo County 530
CA 95654 Martell Amador County 209
CA 95655 Mather Sacramento County 279, 916
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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.