Another WHOIS tool

[firefly]

For details about public domain name records and /or ownership information - http://www.whoismind.com/. The research can be done by domain name, IP address, or e-mail.

[firefly]

Also https://whoisology.com/ - the search may be done by the domain name or the email address. The plus brought by this tool is that it allows the user to check the other domains registered with the same email address or by the same registrant.