WhoisXML API offer a vast selection of domain/IP/DNS data feeds, APIs, research and monitoring web tools and cyber threat intelligence. Their coverage includes 15.6+ billion historical WHOIS records across 7298+ TLDs and ccTLDs, 4.2+ billion domains and subdomains, 12.9+ million IP netblocks, 99.5% of IPs in use, and 20.7+ billion historic DNS lookups gathered from over a decade of data aggregation.
"In my specific use case, WhoisXML API generously supported my independent security research. I created a Worker wrapper around their WHOIS APl to query and extract the exact data points needed for this project."




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