http://www. I really think that this website name has to be the longest website name

Actually - the domain name can not ever be longer. This is the limit. This website was setup to test our DNS server in October 2000, and thus pre-dates the other 63 character websites who claim to have the longest domain name. To date there are TWENTY SEVEN websites claiming the longest domain name. Which is funny when there are over THREE HUNDRED 63 characted domain names registered.

Still - you can claim to be the oldest, and a whois lookup should confirm that.