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
All states and U.S. territories
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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 96035 Gerber Tehama County 530
CA 96037 Greenview Siskiyou County 530
CA 96038 Grenada Siskiyou County 530
CA 96039 Happy Camp Siskiyou County 530
CA 96040 Hat Creek Shasta County 530
CA 96041 Hayfork Trinity County 530, 707
CA 96044 Hornbrook Siskiyou County 458, 530, 541
CA 96046 Hyampom Trinity County 530, 707
CA 96047 Igo Shasta County 530
CA 96048 Junction City Trinity County 530
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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.