whois pinboard.opera.com/view/8cf0a49d-5081-43d8-bb08-af09873671e8

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

pinboard.opera.com/view/8cf0a49d-5081-43d8-bb08-af09873671e8
checking....pinboard.opera.com/view/8cf0a49d-5081-43d8-bb08-af09873671e8
   $ whois pinboard.opera.com/view/8cf0a49d-5081-43d8-bb08-af09873671e8
No whois server is known for this kind of object.