You can find out someones name, even their address from the url address no matter what it is. Just do a whois check.
http://www.whoischeck.co.uk/
only if they haven't spent a very small amount of cash to have their whois linked to their domain hosting company.Mine cost around $6 per year to have the registrant info hid.
Here's mine
Registrant:
c/o YOURNAME.NET
P.O. Box 821650
Vancouver, WA 98682
US
Registrar: NAMESDIRECT
Domain Name: YOURNAME.NET
Created on: 09-APR-01
Expires on: 09-APR-12
Last Updated on: 20-MAR-11
Administrative Contact:
[email protected]
c/o YOURNAME.NET
P.O. Box 821650
Vancouver, WA 98682
US
+1.360-449-5933