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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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 99689 Yakutat Yakutat City and Borough 907
AK 99690 Nightmute Bethel Census Area 907
AK 99691 Nikolai Yukon-Koyukuk Census Area 907
AK 99692 Dutch Harbor Aleutians West Census Area 907
AK 99693 Whittier Chugach Census Area 907
AK 99694 Houston Matanuska-Susitna Borough 907
AK 99695 Anchorage Lake and Peninsula Borough 907
AK 99697 Kodiak Kodiak Island Borough 907
AK 99701 Fairbanks Fairbanks North Star Borough 907
AK 99702 Eielson AFB Fairbanks North Star Borough 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.