Whois Domain Name & IP lookup service to search the whois database for verified registration information.Whois is a widely used Internet record listing that identifies who owns a domain and how to get in contact with them. The Internet Corporation for Assigned Names and Numbers (ICANN) regulates domain name registration and ownership. Whois records have proven to be extremely useful and have developed into an essential resource for maintaining the integrity of the domain name registration and website ownership process.

Here is the list of best whois website

https://whois99.com/
https://whois.net/
https://www.networksolutions.com/whois/index.jsp
https://lookup.icann.org/
https://in.godaddy.com/whois
https://www.whois.com/
https://who.is/
https://megritools.com/whois-lookup

Please add more if you suggest