The Whois XML History API allows developers to gather the history of a domain name's ownership. It has a coverage of 7.0+ billion historical WHOIS records and close to 600 million domains tracked across 2.864+ TLDs. Historical WHOIS data can be useful to identify an attacker's footprints, uncover previous domain owners, and do in-depth research on a domain's past to avoid potential liabilities. It can also be used in marketing to avoid any undesirable connotations when buying a previously-registered domain.
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