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 99658 Saint Marys Kusilvak Census Area 907
AK 99659 Saint Michael Nome Census Area 907
AK 99660 Saint Paul Island Aleutians West Census Area 907
AK 99661 Sand Point Aleutians East Borough 907
AK 99662 Scammon Bay Kusilvak Census Area 907
AK 99663 Seldovia Kenai Peninsula Borough 907
AK 99664 Seward Kenai Peninsula Borough 907
AK 99665 Shageluk Yukon-Koyukuk Census Area 907
AK 99666 Nunam Iqua Kusilvak Census Area 907
AK 99667 Skwentna Matanuska-Susitna 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.