Related sites:

• usps.com

  Welcome | USPS

  

• zip-codes.com

  Zip Code Database List & Canadian Postal Code Listings

  

• getzips.com

  ZIP Express - Windows ZIP Code look up utility

  

• zipcodestogo.com

  ZIP Code Software - Complete List of American Zip Codes - 5-Digit ZIP Code Database Downloads

  

• unitedstateszipcodes.org

  Free ZIP code map, zip code lookup, and zip code list

  

• zipcodecountry.com

  USA usa zip code,postal code

  

• zipcode.org

  ZipCode.org - Zip Codes for USA