PHP - How can I lookup the Zip Code using the City & State

Question

I need to lookup the Zip Code for a list of addresses (which include the city/state). Is there a master zip code list for download (that is free) or are there any web services that will return the full postage info for an address.

Ie, lookup query: 386 Bread & Cheese Hollow Rd, Northport, NY ====> 386 Bread And Cheese Hollow Rd, Northport, NY 11768

Thanks!

Answer 1

There's an API for that.

http://developer.yahoo.com/maps/rest/V1/geocode.html