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 91948 Mount Laguna San Diego County 442, 619, 760, 858
CA 91950 National City San Diego County 619, 858
CA 91951 National City San Diego County 619
CA 91962 Pine Valley San Diego County 442, 619, 760, 858
CA 91963 Potrero San Diego County 619, 858
CA 91976 Spring Valley San Diego County 619
CA 91977 Spring Valley San Diego County 619, 858
CA 91978 Spring Valley San Diego County 619, 858
CA 91979 Spring Valley San Diego County 619
CA 91980 Tecate San Diego County 619, 858
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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.