whois sites.google.com/view/mastering-seo-2/home/

Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)
sites.google.com/view/mastering-seo-2/home/
checking....sites.google.com/view/mastering-seo-2/home/
   $ whois sites.google.com/view/mastering-seo-2/home/ (cached 13.09.24, 11:18:18)
No whois server is known for this kind of object.