Zipwise Free ZIP code web services
![Zipwise Free ZIP code web services](/img/thumbnails/www-zipwise-com-zipwise-free-zip-code-web-services.jpg)
Available services:
zipinfo: Returns full information about a requested ZIP code.
citysearch: Returns all ZIP codes matching a text search by city name or substring.
distance: Returns the Great Circle distance between two ZIP codes.
radius: Returns all ZIP codes within a requested radius of a requested ZIP code.
More information: http://www.zipwise.com/webservices/