Let me save you some trouble
http://www.dnsinspect.com/kitty-kats.net
Hiding behind CloudFlare, Contact them with a DMCA Complaint, they will confirm the IP.
Judging by the DNS info of the Mail Server IP from the above link the site is hosted on LeaseWeb.
However the server is assigned to a UK LLC.
http://whois.domaintools.com/37.1.218.31
Hope this helps you in some way.