Run your own profitable php/mysql powered usa zip code locater website and gather immense traffic from all over the 50 states. US ZipCode Finder is quite a nifty little tool that does exactly as its name suggests. It locates Zip Codes and even displays the location on the map. Using it is quite simple really. Just write the Zip Code in the field and search for it. You can use it as a website for can be used as an facebook app.