Pro move: type dmarc:yourdomain.com or blacklist:1.2.3.4 straight into the box — it switches tools for you.
About this tool. Who registered this domain, through which registrar, and when does it expire? We use RDAP — the modern, structured successor to WHOIS — so results are consistent and machine-verified rather than scraped text.
How to read your whois lookup results
WHOIS shows a domain's registration date, expiry, registrar and status flags, pulled live from the registry.
Watch the expiry date and the status codes. A clientHold status means the domain is not resolving.
Common problems and how to fix them
Domain suddenly stopped working
Check the expiry date and status here. An expired domain or a hold status takes the whole domain offline until renewed or resolved.
Common questions.What is WHOIS?
A public directory of domain registration details: when it was registered, when it expires, and who the registrar is.
Why is contact info hidden?
Most registrars apply privacy protection, replacing personal details with a proxy, which is normal and expected.