my website needs a database. users will enter their US zip code into a text box, the value will be matched against a list of zip codes in the database, if there is a matching zip code a pre-designed webpage will be served. simple. also, users will be able to search the database for all US zip codes that both available and unavailable. There is another website that works in a similar way: [url removed, login to view], which I am of no relation to.