WHOIS Domain Lookup

What is WHOIS Domain Lookup?

A WHOIS lookup queries domain registration data via RDAP (Registration Data Access Protocol) — no API key required. Input: a domain like example.com. Output: registration status, registration date, expiry date, last-updated date, registrar, and nameserver list. Use it for domain due diligence, expiry monitoring, and pre-purchase checks. Data comes from the public RDAP service (rdap.org).

▶Use Cases5 scenarios
  • ◆Pre-purchase domain checks
  • ◆Finding the registrar
  • ◆Tracking domain expiry
  • ◆Domain due diligence
  • ◆Brand protection
▶How to Use4 steps
  1. 1Enter a domain (e.g., example.com, no http:// needed)
  2. 2Click Lookup
  3. 3View status, dates, and registrar
  4. 4Review the nameserver list
▶Features8 features
  • ✓Completely free
  • ✓RDAP protocol
  • ✓No API key
  • ✓Registration/expiry dates
  • ✓Registrar info
  • ✓Nameserver list
  • ✓Domain status
  • ✓No signup
▶FAQ6 questions
What is a WHOIS domain lookup?

An online tool that queries domain registration data via the RDAP protocol. Input: a domain like example.com. Output: status, registration date, expiry date, last-updated date, registrar, and nameservers. No API key needed.

What is RDAP?

RDAP (Registration Data Access Protocol) is the modern replacement for WHOIS, returning structured JSON. rdap.org aggregates registries' RDAP services and is free and public.

Does it require an API key?

No. The tool calls the public RDAP service (rdap.org) directly — no registration or payment.

Why do some lookups fail?

Possible reasons: the domain does not exist, the TLD does not support RDAP, or the registry service is temporarily unavailable. The error message explains the cause.

Can I see the domain owner's contact info?

No. RDAP hides personal registration data by default (GDPR privacy), returning only public data like registrar, dates, and nameservers.

Can I query .cn and other country domains?

It depends on whether the TLD supports RDAP. Major TLDs like .com, .net, and .org all work; some country-code TLDs may not, in which case use your registrar's lookup.