WHOIS lookup
Enter a domain. You get its registration like the example: registrar, expiry date, locks and nameservers, as the registry publishes them.
Who a domain is registered with, when it expires, which nameservers it delegates to, and whether a transfer or delete lock is set. This reads RDAP, the registries' own structured replacement for old-style WHOIS, so the dates and the status codes come back exactly as the registry publishes them. Most registries redact the registrant's contact details under GDPR; that is a state this page reports, not a failure. A registry that does not answer is reported as unknown, which never means the name is free.
Scan your domain
Check SPF, DMARC, DKIM, MX, DNS health, blacklists and domain & SSL expiry in one free scan, with the exact record to paste for each problem it finds.