fetchwhois
Powered by the official IANA RDAP protocol

RDAP Lookup

Perform a live RDAP lookup for any domain using FetchWhois — a free online RDAP client. We query the IANA bootstrap registry to find the authoritative RDAP server for the domain's TLD, then return the full RDAP response in a clean, human-readable format with the raw JSON one click away.

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Instant results

Real-time WHOIS domain lookups resolved directly from authoritative RDAP servers — no queues, no waiting.

ICANN-grade accuracy

Every ICANN lookup pulls structured data straight from the registry and registrar, following the official RDAP standard.

Hundreds of TLDs

From .com and .org to .io, .dev and country-code domains — powered by the IANA bootstrap registry.

Private & simple

No sign-up and no domain upsells. Just clean, trustworthy WHOIS results every time.

How to perform an RDAP lookup

Live RDAP queries via the official IANA bootstrap registry.

1Step 1

Enter the domain name

Type any domain name into the search box. FetchWhois normalizes the input — you can paste a full URL and we extract the domain automatically.

2Step 2

FetchWhois resolves the RDAP endpoint via IANA

We look up the domain's TLD in the IANA RDAP bootstrap file (data.iana.org/rdap/dns.json) to find the authoritative RDAP server. If the TLD publishes multiple endpoints, we try them in order.

3Step 3

View human-readable results and raw RDAP JSON

Parsed results appear in a structured layout. Click the Raw RDAP tab to see the complete, unprocessed RDAP JSON response exactly as returned by the authoritative server.

What is RDAP and how does it improve on legacy WHOIS?

RDAP (Registration Data Access Protocol) is the modern, ICANN-mandated replacement for the legacy WHOIS (port 43) protocol that has served domain registration lookups since the 1980s. RDAP was developed by the IETF (RFC 7480–7484) and is required by ICANN for all gTLD registries and registrars. Unlike WHOIS, which returns inconsistent free-form text that varies by registry, RDAP returns structured JSON with standardized field names — making it far easier to parse programmatically and far more consistent across different TLDs and registrars.

RDAP also addresses several limitations of legacy WHOIS: it supports HTTPS for encrypted transport, offers differentiated access control (so registrars can give authenticated users access to otherwise-redacted data), supports internationalized domain names (IDNs) natively, and provides standardized error codes. The IANA maintains a bootstrap file that maps each TLD to its authoritative RDAP server URL, eliminating the inconsistency of having to find the right WHOIS server for each TLD.

FetchWhois is built entirely on RDAP. Every lookup queries the IANA bootstrap file to find the correct RDAP server, then fetches the live domain record and parses the structured JSON response into a human-friendly display. The raw RDAP JSON is always available for developers who need the unprocessed data.

RDAP Lookup — Frequently Asked Questions

Everything you need to know about WHOIS, ICANN and RDAP domain lookups.