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 95237 Lockeford San Joaquin County 209, 350
CA 95240 Lodi San Joaquin County 209, 350
CA 95241 Lodi San Joaquin County 209
CA 95242 Lodi San Joaquin County 209, 350
CA 95245 Mokelumne Hill Calaveras County 209, 350
CA 95246 Mountain Ranch Calaveras County 209, 350
CA 95247 Murphys Calaveras County 209, 350
CA 95248 Rail Road Flat Calaveras County 209, 350
CA 95249 San Andreas Calaveras County 209, 350
CA 95250 San Andreas Calaveras County 209
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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.