whois www.xing.com/profile/maksut_balta079736
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Try for webbased whois (don't expect it to work yet)
www.xing.com/profile/maksut_balta079736
checking....www.xing.com/profile/maksut_balta079736
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whois
www.xing.com/profile/maksut_balta079736
No whois server is known for this kind of object.