What is the whois server for .ninja?
By default, whois server for .ninja TLD is whois.unitedtld.com. This can be used to fetch the .ninja domain/website whois information. Extension .ninja sponsoring organisation is United TLD Holdco Ltd. and its registered on 19-12-2013.
Sponsoring Organisation Details
United TLD Holdco Ltd..
One Clarendon Row.
Dublin 2.
Ireland.
Usage
whois -h <whois server> <domain name>
For example
whois -h whois.unitedtld.com hiox.ninja