ICANN is a global non-profit organisation responsible for coordinating key Internet infrastructure: domain names, IP address allocation, and protocol identifiers. The “Lookup” service on their site lets you query registration data for domain names and internet number resources (who owns what, registrar information, etc).
If you manage a website, domain, run security audits, or do compliance/investigation, you’ll often need to know who registered a domain, when it expires, its registrar, and more. The ICANN Lookup tool gives authoritative data that helps with domain ownership transparency, dispute resolution, or verifying registrations. Without such coordination of DNS/addresses, the global Internet could fragment or see duplicates/mismatches.
You visit the Lookup tool, enter a domain name (or internet number resource) and you receive current registration data from the relevant registrar or registry. Note: some fields may be redacted (especially personal contact info) due to privacy laws like GDPR.
