This is a web-based application that can check the registration status of a domainname. This is a realy good solution for hosting providers, that wants to let it's users to check if a domainname is still free for registration or not. I've made this for a view small hosting providers, and after some development (5 years) I've now got the best domain checkup script ever! ;) (mrrff, smelly isn't it?) It's not using any system calls! It's opening a socket to the whois server.