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About WHOIS Lookup Online
This tool queries the WHOIS database for any domain or IP address. The response shows ownership and registration details — registrar, registration date, expiration date, name servers, abuse contact, and (for some TLDs) the registrant's name and contact information.
WHOIS data is essential for verifying domain authenticity, identifying potential phishing domains, investigating IP ranges in security incidents, and planning domain acquisitions. Some TLDs redact personal information under GDPR; the public fields you see may vary by registrar.
Use it before purchasing a similar-sounding domain (to check for trademark conflicts), when investigating suspicious links in your inbox, or to find the registered owner of an IP range that appears in your logs.
How to use this tool
How to look up domain registration info via WHOIS
Enter the domain
"Domain" expects an apex domain like `example.com` — no `https://`, no path, no `www.`. Subdomains aren't separately registered, so a WHOIS lookup on `blog.example.com` returns the record for `example.com`.
Press Run
Result returns a single `whois` field — the raw text response from the appropriate WHOIS server for the TLD. Expect blocks like Registrar, Creation Date, Updated Date, Expiry Date, name servers, and registrar contact.
What's behind redactions
Since GDPR (2018), most personal details on contacts are masked with privacy or replaced by registrar-controlled aliases. To reach the actual registrant you'd need to go through the registrar's official abuse-contact channel — public WHOIS isn't enough.
Reading the dates
Expiry date matters most — a domain expiring within 90 days might be unstable. Updated Date isn't a transfer date; it's just "this record was touched". Creation Date can hint at domain age, useful for trust signals.