You might want to contact a website owner for any tips or something else then how will you find the owner details? Here i have the solution for that. Its WHOIS lookup service, this service is promoted by the registrar. There are many websites who offers whois lookup service. I found these by google and found them to be very useful.

http://www.whois.net

Just open this website and enter the site name whose owner you want to know. Hit enter you will get complete owner details.