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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State directory

Alaska ZIP Codes

Complete postal directory, details, and geographic map for the State of Alaska.

State ZIP Code City County Area Codes
AK 99729 Cantwell Denali Borough 907
AK 99730 Central Yukon-Koyukuk Census Area 907
AK 99731 Fort Greely Southeast Fairbanks Census Area 907
AK 99732 Chicken Southeast Fairbanks Census Area 907
AK 99733 Circle Yukon-Koyukuk Census Area 907
AK 99734 Prudhoe Bay North Slope Borough 907
AK 99736 Deering Northwest Arctic Borough 907
AK 99737 Delta Junction Southeast Fairbanks Census Area 907
AK 99738 Eagle Southeast Fairbanks Census Area 867, 907
AK 99739 Elim Nome Census Area 907
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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.