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 91741 Glendora Los Angeles County 626, 840, 909
CA 91743 Guasti San Bernardino County 909
CA 91744 La Puente Los Angeles County 626
CA 91745 Hacienda Heights Los Angeles County 562, 626
CA 91746 La Puente Los Angeles County 562, 626
CA 91747 La Puente Los Angeles County 626
CA 91748 Rowland Heights Los Angeles County 562, 626, 657, 714, 840, 909
CA 91749 La Puente Los Angeles County 626
CA 91750 La Verne Los Angeles County 626, 840, 909
CA 91752 Mira Loma Riverside County 840, 909, 951
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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.