FAQ
Can it show who owns a domain?
Usually not. Since GDPR most registrars redact the registrant name, email and phone, leaving only registrar, dates and nameservers public.
Why does some domains return nothing?
Different TLDs run different registry systems. Some country-code domains have their own lookup service that RDAP may not cover, so the result comes back empty.
How is RDAP different from classic whois?
RDAP is the modern replacement: structured data instead of free text, with consistent formatting that is easier to process programmatically.
Why does the site still work after the expiry date?
Expiry does not stop resolution immediately. Most TLDs run a renewal grace period (commonly 0-45 days) followed by a redemption period, during which DNS may keep working even though the name cannot be newly registered. Watch the days-remaining figure rather than waiting for the site to go dark.
About this tool
Looks up registration data over RDAP (the modern replacement for whois): registrar, created / expiry / updated dates, nameservers and status, with days remaining and colour-coded warnings on expiry.
Why RDAP rather than classic whois: classic whois speaks free text over port 43 with a different format per registry and frequent rate limits, while RDAP is structured JSON over HTTP that allows cross-origin queries - which is exactly why this tool can run directly from your browser without routing your query through this site.
Not finding the registrant is expected. Since GDPR, mainstream registrars redact name, email and phone, leaving the registrar, key dates, nameservers and status public. To contact an owner, use the registrar's anonymised contact form or abuse channel.
The expiry date is not the outage date. Most TLDs run a renewal grace period after expiry (commonly 0-45 days) followed by a redemption period at a much higher price; throughout that time the name may keep resolving even though it cannot be newly registered. So "expired" does not mean the site is immediately gone, and a site that still loads does not mean you have time - watch the days-remaining figure.
Coverage limit: each registry deploys RDAP itself. .com, .net and .org are well covered; some country-code TLDs either run their own service or offer no RDAP at all, in which case you get an empty result or a 404 - which does not mean the domain is unregistered. Queries go through the public rdap.org bootstrap with a 12 second timeout.