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 94999 Petaluma Sonoma County 707
CA 95001 Aptos Santa Cruz County 831
CA 95002 Alviso Santa Clara County 341, 408, 510, 669
CA 95003 Aptos Santa Cruz County 408, 669, 831
CA 95004 Aromas Monterey County 831
CA 95005 Ben Lomond Santa Cruz County 831
CA 95006 Boulder Creek Santa Cruz County 408, 650, 669, 831
CA 95007 Brookdale Santa Cruz County 831
CA 95008 Campbell Santa Clara County 408, 669
CA 95009 Campbell Santa Clara County 408
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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.