U.S. POSTAL CODE DIRECTORY

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Find ZIP Codes by city, state, county, or number. Explore location details with a clean, easy-to-use directory.

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Directory coverage 42,735 ZIP Code records

Zip Codes




State Zip Code City County Area Codes
AK 99636 New Stuyahok Dillingham Census Area 907
AK 99637 Toksook Bay Bethel Census Area 907
AK 99638 Nikolski Aleutians West Census Area 907
AK 99639 Ninilchik Kenai Peninsula Borough 907
AK 99640 Nondalton Lake and Peninsula Borough 907
AK 99641 Nunapitchuk Bethel Census Area 907
AK 99643 Old Harbor Kodiak Island Borough 907
AK 99644 Ouzinkie Kodiak Island Borough 907
AK 99645 Palmer Matanuska-Susitna Borough 907
AK 99647 Pedro Bay Lake and Peninsula Borough 907
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ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.

ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.

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