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 95469 Potter Valley Mendocino County 707
CA 95470 Redwood Valley Mendocino County 707
CA 95471 Rio Nido Sonoma County 707
CA 95472 Sebastopol Sonoma County 707
CA 95473 Sebastopol Sonoma County 707
CA 95476 Sonoma Sonoma County 415, 628, 707
CA 95480 Stewarts Point Sonoma County 707
CA 95481 Talmage Mendocino County 707
CA 95482 Ukiah Mendocino County 707
CA 95485 Upper Lake Lake 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.