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Free WHOIS and RDAP domain lookup

RDAP is the modern, structured replacement for WHOIS. Enter a domain to see its registrar, status, key dates, and nameservers.

Background

What is RDAP?

RDAP (Registration Data Access Protocol) is the standard way to look up a domain’s registrar, status, key dates, and nameservers. It replaces WHOIS with structured JSON over HTTPS and is now the lookup service registries maintain. Personal contact details are often redacted for privacy.

How to read the result

RDAP returns structured registration data over HTTPS and is replacing WHOIS. What each registry publishes varies, and personal details are often redacted.

Read status codes and dates together when you are investigating a transfer, a renewal, or a nameserver change.

Coverage

What this tool checks

  • The registrar, its website, and its abuse contact
  • Domain status codes, such as transfer locks
  • Registration, last updated, and expiry dates
  • The nameservers listed with the registry
  • DNSSEC signing state and DS records
  • Public contact details, when the registry publishes them

Reference

Common domain status codes

Status Meaning
clientTransferProhibited The registrar has locked the domain against transfers.
clientUpdateProhibited The registrar has locked the domain’s details against changes.
clientDeleteProhibited The registrar has locked the domain against deletion.
clientHold or serverHold The domain is not published in DNS, so it does not resolve.
redemptionPeriod The domain expired and was deleted, but can still be restored.
pendingDelete The domain will be released for registration soon.

Troubleshooting

Common problems and how to fix them

No result
Check the domain name and extension. Some registries do not offer RDAP yet or limit the data they return.
Contact details are redacted
Registries hide personal data for privacy. Use the registrar’s contact or disclosure process if you have a legitimate need.
Unexpected nameservers
Check the nameserver settings in the registrar account and confirm whether a DNS migration finished.
Transfer lock present
A clientTransferProhibited status blocks transfers. Remove the lock at the registrar before you start a transfer.

Example

Registrar:   Example Registrar, Inc.
Status:      clientTransferProhibited
Expires:     2027-06-14
Nameservers: ns1.provider.example, ns2.provider.example
DNSSEC:      Signed
Not every registry returns every field.

FAQ

Questions about WHOIS and RDAP

What is RDAP?
The Registration Data Access Protocol returns domain registration data as structured JSON over HTTPS. It is the successor to WHOIS.
Why is contact information hidden?
Registries and registrars redact personal data to comply with privacy laws and their own policies.
Can RDAP show the DNS provider?
RDAP lists the nameservers, which usually point to the DNS provider. The nameserver checker identifies the provider from them.
Does RDAP data update immediately?
It depends on the registrar and registry. Recent changes can take some time to appear.

Keep checking

Related tools

Specifications
RFC 9083: JSON Responses for the Registration Data Access Protocol (RDAP) (opens in a new tab)
ICANN: EPP status codes (opens in a new tab)