U.S. POSTAL CODE DIRECTORY

Every U.S. ZIP Code.
One simple search.

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

✓ Browse by state✓ Search cities & counties✓ Explore ZIP+4 information
Directory coverage 42,735 ZIP Code records

Zip Codes




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
Page 19 from 28

Map of

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.

Useful Websites: US Zip Codes