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WHOIS / RDAP Lookup

Look up public registration data for a domain, public IP address, or ASN using RDAP. The result can show registry records, network ranges, status fields, and dates when the public registry returns them.

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Enter a public domain, IP address, or ASN to start.
Technical response details (optional)

        

Direct answer

WHOIS / RDAP Lookup: answer first

Look up public RDAP registry records for domains, IP addresses, and ASNs. Use the result as an observable public-signal check with stated limitations, not as an absolute guarantee.

Last updated

B2B diagnostic report model

Domain intelligence diagnostics

Domain checks connect public DNS, RDAP-safe context, reverse DNS, CAA, DNSSEC hints, IP/ASN context, provider hints, and blacklist context.

SummaryStart with a plain-language status for the public target.
Top issuesPrioritize the few findings that need attention first.
What passedShow expected public signals without turning them into a certification.
What needs reviewSeparate limited, unavailable, and review-worthy signals.
Why it mattersExplain the business, delivery, crawl, or implementation impact.
Recommended fixesPoint to the DNS, hosting, email, CMS, or SEO owner who can act.
What this tool cannot checkThis does not enumerate subdomains, scan ports, prove ownership, prove origin IP exposure, or certify infrastructure security.
Client-safe copyClient-safe copy should keep high-level DNS/RDAP/provider findings while suppressing raw payloads and RDAP contact personal data.
Monitoring beta (optional)Optional monitoring beta can compare DNS, RDAP status, expiration windows, provider hints, reverse DNS, and blacklist context for approved public domains.

Client-safe report

Share findings without leaking raw technical material

Use Safe Copy or this page's summary when sending results to a client, vendor, developer, or support team. Raw headers, credentials, tokens, cookies, private addresses, email local-parts, and oversized payloads should stay out of client-facing copy.

Check my website/domain

What this checks

Public DNS, HTTP, HTTPS, certificate, redirect, header, IP/ASN, or domain configuration signals.

Limits

What this cannot check

It cannot perform credentialed vulnerability testing, scan private hosts, bypass access controls, or certify complete security.

Read results

How to use the output

Treat results as review signals for this browser/session or public target. Re-test after one change, then use Safe Copy or notes that avoid raw identifiers.

SEO and AI citation summary

WHOIS / RDAP Lookup: what this tool does

Looks up public domain, IP, and ASN registry records through RDAP.

How to use

  1. Enter one public IP, ASN, domain, URL, or CIDR value accepted by the tool.
  2. Compare the network summary with the visible IP shown by Public Exposure Report.
  3. Use masked copy when sharing output with a provider or support desk.

What the result means

Treat IP, ASN, geolocation, RDAP, blacklist, latency, and subnet outputs as public network context. They are useful support signals, not identity or reputation guarantees.

Limitations

  • This tool reports observable signals only; it is not a guarantee or certification.
  • Uses official RDAP bootstrap and registry endpoints.
  • Results can change after VPN reconnects, DNS propagation, browser updates, cache changes, or provider configuration changes.

WHOIS Lookup — Common Questions

What information does a WHOIS lookup show?

A WHOIS lookup returns publicly available domain registration data: registrar name, registration and expiry dates, nameservers, and (when not privacy-protected) the registrant name, organisation, and contact details. For IP addresses and ASNs, WHOIS returns the network owner, assigned block, and registry information from ARIN, RIPE, APNIC, or other regional registries.

Why does WHOIS show privacy-protected or redacted contact details?

Since GDPR came into force (2018), most registrars redact personal contact information from public WHOIS records for domains registered to individuals in the EEA. Domain privacy services (offered by Namecheap, GoDaddy, Cloudflare, etc.) also replace registrant contact info with proxy details. The domain is still registered to a real person — the registry just does not show it publicly. Legitimate legal requests to the registrar can still retrieve the real registrant.

What is RDAP and how does it differ from WHOIS?

RDAP (Registration Data Access Protocol) is the modern replacement for WHOIS. It returns structured JSON data instead of plain text, supports HTTPS, handles internationalised domain names (IDN) correctly, and allows partial searches. ICANN began requiring registrars to support RDAP in 2019. This tool uses RDAP, which means results are more structured and reliable than classic WHOIS, especially for newer TLDs.

How do I find who owns a domain that has privacy protection?

For abuse, legal, or security matters, contact the registrar directly — they are required to respond to legitimate requests. You can find the registrar name from the WHOIS record (it is never redacted). File an abuse report through the registrar's abuse contact, which is also publicly listed. For ongoing investigations, law enforcement can serve a legal process to compel the registrar to disclose registrant identity.