WHOIS lookup
Enter a domain, IP address, or ASN to retrieve registration data via RDAP — the modern successor to WHOIS.
About this tool
WHOIS answers who is responsible for a domain, an IP block, or an autonomous system, and it is the registry's own record rather than an inference. For a domain it returns the registrar, the creation and expiry dates, the current nameservers, and the status codes that govern what can be done with the name. For an IP address or ASN it returns the allocation, the holder, and the abuse contact. The protocol has largely been replaced by RDAP, which returns structured JSON instead of free text that varied by registry, and this tool queries RDAP. What changed most in practice is contact data. Since GDPR took effect in 2018, registrars redact personal details for most domains, so registrant name and email typically show as privacy-protected rather than the person behind them — a deliberate change, not a lookup failure. The fields that remain are still the useful ones for operational work: expiry dates for renewal tracking, nameservers for verifying a migration, status codes for diagnosing why a transfer is blocked, and abuse contacts for reporting.
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Enter a domain name, IPv4/IPv6 address, or ASN (e.g. AS15169) in the input field.
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Click Look Up to fetch registration data via RDAP.
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View the registrar, creation date, expiry date, nameservers, and contact details.
Check a domain's expiry date before it gets snapped up by a competitor.
Find the registrar and nameservers for a domain you're troubleshooting.
Look up the owner and contact details behind an IP address or ASN.
Domain lookup
github.comRegistrar: MarkMonitor — Expires: 2025-10-09IP lookup
1.1.1.1Network: 1.1.1.0/24 — Cloudflare, Inc.ASN lookup
AS15169Google LLC — ARIN registeredRegistrant name and email show as redacted
Cause: Privacy regulation. Registrars withhold personal contact data for most domains, and many registrants additionally buy a privacy service that substitutes proxy details.
Fix: Use the registrar's abuse contact or the anonymised forwarding address to make contact. Full registrant details are generally available only through a legal process, not through a public lookup.
A transfer is blocked and the reason is unclear
Cause: A status code is preventing it. clientTransferProhibited is a registrar lock you can remove yourself; a 60-day lock applies after registration or after a change of registrant; pendingDelete and redemptionPeriod mean the name has expired.
Fix: Read the status codes in the result and act on the specific one. Most locks are self-service in the registrar's control panel; the 60-day post-transfer lock cannot be waived.
A country-code domain returns little or nothing
Cause: RDAP coverage is not universal. Some ccTLD registries run their own WHOIS service without an RDAP endpoint, and others restrict access or rate-limit it.
Fix: Query the registry's own WHOIS service directly for that TLD. Expiry dates in particular are withheld entirely by several ccTLD registries as a matter of policy.
These answers explain common whois tasks, expected input formats, and edge cases so both visitors and search engines can understand what this tool does.
What is RDAP?
RDAP (Registration Data Access Protocol) is the modern replacement for the legacy WHOIS protocol. It returns structured JSON instead of unformatted text, supports internationalized domain names, and enforces consistent data formats across registrars.
Why is some registrant data redacted?
Privacy protection services — offered by most registrars — replace personal contact information with the registrar's proxy details. This is standard practice under GDPR and other privacy regulations.
Can I look up an IP address or ASN?
Yes. Enter an IPv4 or IPv6 address to see the network's registered range and operator. Enter an ASN like AS15169 to see the organization that holds it.