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 91933 Imperial Beach San Diego County 619
CA 91934 Jacumba San Diego County 442, 619, 760, 858
CA 91935 Jamul San Diego County 619, 858
CA 91941 La Mesa San Diego County 619, 858
CA 91942 La Mesa San Diego County 619, 858
CA 91943 La Mesa San Diego County 619
CA 91944 La Mesa San Diego County 619
CA 91945 Lemon Grove San Diego County 619, 858
CA 91946 Lemon Grove San Diego County 619
CA 91947 Lincoln Acres San Diego County 619
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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.