whois https://sketchfab.com/sohbetonline
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Try for webbased whois (don't expect it to work yet)
https://sketchfab.com/sohbetonline
checking....https://sketchfab.com/sohbetonline
$
whois
https://sketchfab.com/sohbetonline
No whois server is known for this kind of object.