whois www.xing.com/profile/Azao_Azzo

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

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