whois https://core.trac.wordpress.org/ticket/62592/

Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)
https://core.trac.wordpress.org/ticket/62592/
checking....https://core.trac.wordpress.org/ticket/62592/
   $ whois https://core.trac.wordpress.org/ticket/62592/
No whois server is known for this kind of object.