whois www.xing.com/profile/Caglar_Chorum

Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)

www.xing.com/profile/Caglar_Chorum
checking....www.xing.com/profile/Caglar_Chorum
   $ whois www.xing.com/profile/Caglar_Chorum
No whois server is known for this kind of object.