whois https://ckan-dlsc-dev.unl.edu/uploads/user/2022-12-05-195351.475429maxwin-slot.html

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Try for webbased whois (don't expect it to work yet)
https://ckan-dlsc-dev.unl.edu/uploads/user/2022-12-05-195351.475429maxwin-slot.html
checking....https://ckan-dlsc-dev.unl.edu/uploads/user/2022-12-05-195351.475429maxwin-slot.html
   $ whois https://ckan-dlsc-dev.unl.edu/uploads/user/2022-12-05-195351.475429maxwin-slot.html
No whois server is known for this kind of object.