WhoisXML API

For more than 10 years, WhoisXML API has gathered, analyzed, and correlated domain, IP, and DNS data for a more secure and transparent Internet. We offer a vast selection of domain/IP/DNS data feeds, APIs, research and monitoring web tools and cyber threat intelligence. Our coverage includes 13.7+ billion historical WHOIS records across 2864+ TLDs and ccTLDs, 4.2+ billion domains and subdomains, 10.3+ million IP netblocks, 99.5% of IPs in use, and billions of historic DNS lookups gathered from over a decade of data aggregation. Our products and intelligence sources can support all types of security companies, enterprises, and experts to empower next-generation cybersecurity processes and as a building block for thorough online cybercrime investigations. We are a cyber threat intelligence provider trusted by over 50,000 clients and have been ranked one of Inc. 5000 fastest growing IT companies since 2016. Our customer base includes commercial security platforms (SIEM, SOAR, and TIP), Security Operations Centers (SOCs), Managed Security Service Providers (MSSPs), Fortune 1000 companies, top cybercrime & law enforcement units, government agencies, banks, payment processors, telcos, and brand protection agencies. We also work closely with domain registries/registrars, domain investors/brokers, marketing researchers, big-data warehouses, web analytics firms, investment funds, VC firms, SMBs with a digital footprint, and more.