That zipinfo.com is for "paying customers". I don't know if that means
subscriptions or what.
I found a great website for inexpensive developer and marketing lists
for zip codes.
http://www.listfactor.comThey have lists for united states zip codes, cities, and counties. I
needed the counties and found that there are ove 3000 in the united
states! Didn't know that.
Plus on their products page, it says that there are free updates when
new data is available.
Brandon