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Finding every domain registered by one person or company — and why we do not offer it.
We do not provide reverse WHOIS search.
This page used to show a search box that returned lists of domains for a name, email or company number. Those results were generated, not looked up, so we have removed it. A tool that invents ownership records about a named person is worse than no tool. We would rather publish the explanation below and be straight about what we can and cannot do.
An ordinary WHOIS or RDAP lookup runs one way: you give it a domain, it returns that domain's registration record. Reverse WHOIS runs the other way — you give it a registrant detail, such as an email address or an organisation name, and it returns every domain matching it. Investigators, brand-protection teams and acquisition scouts use it to map a portfolio.
The registries do not publish a searchable index of registrants. RDAP — the IETF protocol that replaced WHOIS, and the one behind our own lookups — is deliberately forward-only: there is no query that asks which domains a given party holds. The providers who sell reverse WHOIS build it themselves, crawling and storing hundreds of millions of individual records over years and then indexing them. That dataset is the product, which is why it is licensed rather than open.
Two limits apply even to the paid services, and any tool hiding them is overselling. GDPR and ICANN's temporary specification led most registries to redact registrant details for private individuals, so recent registrations are frequently invisible. And results skew historical — they reflect what was public at crawl time, not necessarily who holds the name today.
Forward lookups we do properly, and for free. Our WHOIS lookup reads the live registry record for any domain over RDAP — registrar, registration and expiry dates, nameservers and status codes, exactly as the registry publishes them, with no field filled in by us. If you already know one domain in a portfolio, that record is usually the most informative single thing available, and its nameservers often reveal shared infrastructure.
To check many names at once, the bulk checker runs that same live lookup across a list and tells you which are registered, which have no record, and which it could not verify.
If you genuinely need reverse WHOIS, it is sold by dedicated data providers — DomainTools and WhoisXML API are the two most commonly used — on paid plans. We have no commercial relationship with either and earn nothing from naming them; they are simply where this capability actually exists. Expect to pay for it, and expect the redaction caveats above to apply whoever you buy from.