whois agenjoker123-b1.onepage.website/

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

agenjoker123-b1.onepage.website/
checking....agenjoker123-b1.onepage.website/
   $ whois agenjoker123-b1.onepage.website/
No whois server is known for this kind of object.