whois https://sites.google.com/view/ce-top-backlink/

Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)
https://sites.google.com/view/ce-top-backlink/
checking....https://sites.google.com/view/ce-top-backlink/
   $ whois https://sites.google.com/view/ce-top-backlink/
No whois server is known for this kind of object.