DomainTools Whoiswhois.domaintools.com
Free WHOIS lookup with hosting history and reverse IP hints. The paid Iris platform adds historical WHOIS, reverse WHOIS and infrastructure pivoting.
domainip / asndetails
tools / whoxy
Whoxy
WHOIS lookup with cheap historical WHOIS and reverse WHOIS by registrant name, email, company or keyword.
freemiumacct optionalapiweb
field note
Reverse WHOIS on an email found in an old record can surface every other domain the same person registered before privacy protection became standard.
used in playbooks
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