Zip Codes & Postal Codes
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Look Up a ZIP Code (U.S. Postal Service)
Provides the zip+4 code for any U.S. address given. Formed by the union of many individual state directories.
National Address Server
Enter a partial U.S. postal address and the server attempts to rewrite the address in the proper format along with the ZIP+4 code.
Instant ZIP code search including U.S. census data that can be searched by ZIP code or city name.
Zip and Area Code Lookup
Several resources including: Information About a Single Zip Code; Distance Between Zips; Zips in an Area Code; Zips in a State's Counties; etc.
Zip Code Database
Find ZIP codes and postal information for all U.S. states and territories. Includes ZIP code search by city and by area code.
The Untold Story of the Zip Code
International Postal Codes
International - Worldwide Postal Codes
International - GeoPostcodes Postal & Zip Codes Database
Zip codes and Postal codes of the World, database with region, city, zip code, latitude & longitude information.
Canada - Postal Codes
France - Postal Codes
Includes postal codes for Andorra, Belgium, Germany, Italy, Luxembourg, Portugal, and Spain.
Italy - Postal Codes
All Italian ZIP Codes with search by Address, by City, by Postal Code and by phone Area Code.
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