WHOIS
Domain or IP registration details via RDAP.
About WHOIS
This WHOIS tool uses RDAP, the standardised JSON replacement for the legacy port-43 WHOIS protocol. RDAP returns structured data that is consistent across registries: the domain handle, current status flags, registration and expiry dates, nameservers, and registrar contact. For IP addresses it returns the allocated range, the responsible regional internet registry, and the organisation that holds the prefix. Both lookups route through rdap.org to the correct authoritative source.
When to use it
Run this before buying a domain to confirm who currently holds it and when it expires. Use it during incident response to identify the registrar contact for a malicious domain that needs takedown. Network operators query the IP form to find the organisation responsible for an abusive netblock, then use the abuse contact to file a report. Researchers use the events log to trace a domain's history.
How to read the results
Check the status flags first. clientTransferProhibited means the registrant has locked the domain against transfer, which is normal for active domains. Pending values like clientHold mean the domain is suspended. Registration and expiry dates show how long the domain has been held and when it must renew. The Events section lists all state changes with timestamps, useful for understanding a domain's history.
Frequently asked questions
Why is the registrant's name hidden from the result? ▾
Since GDPR took effect, most registrars redact personal contact details for registrants in the EU and many outside it. Privacy proxies handle the same job globally. The registrar handle is still visible so you can request information through them.
What is the difference between WHOIS and RDAP? ▾
WHOIS is the old text-based protocol from 1982 on port 43. RDAP is the modern replacement using HTTP and JSON. RDAP delivers consistent data across registries and supports authentication for revealing additional fields to legitimate requesters.
Can I look up any country code TLD? ▾
Most ccTLDs publish RDAP endpoints now, but a few smaller ones still only support legacy WHOIS. If a ccTLD returns an error here, check the registry's website directly for their lookup tool.
How current is the data? ▾
RDAP responses are served live by the registry on each request. There is no caching delay. The data reflects whatever the registrar has pushed to the registry, which is typically near real-time.