Address and zip codes for use on the web

[ryantroop]

Are there any open source/free to use, commonly updated... either dumps or APIs that will let someone have zip codes and addresses validated?

Think monster.com or careerbuilder.com's location search, or something similar.

Thanks

Ryan

[pritaeas]

I've never come across a reliable (regularly updated) free address validation API.

[ryantroop]

I did find smartystreets... I have not used it, but I did sign up. Under 250 queries/mo. free. Seems like a good deal for a start-up, and the API looks simple using REST or JSON

You have any experience with them, or anything similar?

[pritaeas]

For work I had to implement one, can't remember which. But they had a decent WCF service.

[Mike_H]

Check out these two links:
https://www.usps.com/business/webtools.htm

http://stackoverflow.com/questions/4749706/lookup-city-and-state-by-zip-google-geocode-api