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
All states and U.S. territories
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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 95424 Clearlake Park Lake County 707
CA 95425 Cloverdale Sonoma County 707
CA 95426 Cobb Lake County 707
CA 95427 Comptche Mendocino County 707
CA 95428 Covelo Mendocino County 530, 707
CA 95429 Dos Rios Mendocino County 707
CA 95430 Duncans Mills Sonoma County 707
CA 95431 Eldridge Sonoma County 707
CA 95432 Elk Mendocino County 707
CA 95433 El Verano Sonoma County 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.