USPS - ZIP Code Lookup
Look up a zip code by address, city and State.
ZIP Code Lookup
Lets you get a list of all ZIP codes in a city, county, or area code.
ZIP Code Radius and Distance Lookup
Offers ZIP Code lookup, distance and radius search.
Zip code search
Find postal codes for USA, French and Australia. Reverse look-up available.
Zip Codes Directory
Provides search for ZIP and area codes for a city.
Zip Codes Finder
A zip code search offering city demographics, local weather and maps.
Zip-codes.com
United States. Includes some statistics and histories of the post office and of the development of the ZIP (zone improvement plan).
zipdecode
Java applet which maps United States zip codes on a map, reducing possible matches as the number is typed.
ZIPFind's Postal Code Calculator and Data
Calculate distance in miles between two ZIP Codes. Find all ZIP Codes within a radius of a ZIP Code.
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