whois https://ckan.futr-hub.de/uploads/user/2022-11-03-151353.363163slot2.html

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Try for webbased whois (don't expect it to work yet)
https://ckan.futr-hub.de/uploads/user/2022-11-03-151353.363163slot2.html
checking....https://ckan.futr-hub.de/uploads/user/2022-11-03-151353.363163slot2.html
   $ whois https://ckan.futr-hub.de/uploads/user/2022-11-03-151353.363163slot2.html
No whois server is known for this kind of object.