WHOIS / RDAP queries the official registry data for a domain, IP range or ASN using the modern RDAP protocol with redirect following, returning registration, registrar and contact details.
Enter a domain (example.org), an IP or CIDR (203.0.113.0/24), or an ASN (AS64500) and run the tool. The probe uses rdap.org to bootstrap to the correct registry and follows redirects.
Input: Domain, IP or ASN — e.g. AS64500.
For domains: registrar, creation, update and expiry dates, name servers, and status flags (clientTransferProhibited etc.). For IPs/ASNs: the holder, network range, country and registry. Status flags control what operations are permitted on the domain; an expired expiry date means the domain is at risk of deletion.
→ Check a domain’s registrar and expiry date before renewal.
→ Look up the holder and registry for an IP range or ASN.
→ Identify the abuse contact for a malicious host.
→ Verify domain status flags during a transfer or dispute.
WHOIS is the older text protocol served on port 43; RDAP is its modern successor — a REST/JSON protocol with structured data, internationalisation and built-in redirection. RDAP is the official standard for registry data and this tool uses it.
Under privacy regulations like GDPR, most registries redact registrant contact details and often provide a proxy or web-contact form instead. Technical and abuse contacts may still be visible where published.
Flags like clientTransferProhibited prevent unauthorised transfers or deletions. They are set by the registrar for protection. A status of pendingDelete or redemptionPeriod indicates the domain is in a lifecycle phase toward deletion or recovery.