Zipoid is a ZIP Code verification, look-up and distance calculator tool. It contains a database of over 42000 ZIP Codes and is of great assistance to marketing, mail-order, transportation, relocation, shipping and catering companies. Zipoid allows its users to calculate the distance ranges between different ZIP Code locations to estimate transportation costs, check ZIP Codes for validity, look up telephone area codes assigned to various ZIP Code locations, or view the list of all cities and towns located within the specified ZIP Code. Marketers can use the tool for local mail advertising campaigns, since Zipoid automatically identifies all ZIP Codes found within the specified radius. The search can de done by a ZIP Code, City Name, Area Code, or County Name.