iTypeUSA Zip Code Finder
Provides a full list of zip codes in the United States by state, city, or county.
KJL Software, Inc.
Databases of US ZIP Code and Area Code information.
Links to Post Office Pages
Links and resources for postal code and international address and address format data.
MyZipCodeMap
Provides detailed map of all US zip codes, powered by google map.
National Address and ZIP+4 Browser
Interactively browse all address and ZIP+4 records in the United States.
Postage Rates Worldwide
Current postage rates, Domestic, Europe, USA, cards and letters, in over 60 countries
Postage rates worldwide
Directory of mail rates (domestic & international letter rates) with links to the rate calculators or rate tables of postal services in most countries of the world. email rate queries supported.
Postal Code Lookup
Search US and Canada postal codes by cities, towns and area codes.
PostalRates.info
Postal rates, post codes, philately and Postal Authorities around the world.
Simply Zip Codes
ZIP code, city/state, area code lookup along with distance calculations and population data.
SpeedKeys.com
SpeedKeys is a fast and easy zip code, city, state and area code look-up program. It can also generate an optional PostNET Barcode.
The National Address Server
Translates valid U.S. postal addresses to the proper format along with the ZIP+4 code.
United States Postal Service: Zip Code Lookup
Find the postal code for a United States address.
US Zip and Area codes
Structured and mapped list of states, counties and cities within the United States. Corresponding information like zip, area, FIPS codes.
US Zip Code
Offers US postal code database, search by state or city name.
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