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WHOIS Lookup

Queries databases that store the registered users or assignees of an Internet resource.

Port 43 Record
Awaiting query...

What is the WHOIS Lookup?

Looks up a domain's registration record straight from the registry that manages its TLD, showing registrar, dates, name servers, and status codes as returned in raw form.

How it works

The server opens a raw TCP socket on port 43 (the standard WHOIS port, per RFC 3912) to the registry server for the domain's TLD — for example whois.verisign-grs.com for .com/.net or whois.nic.cl for .cl, falling back to whois.iana.org when the TLD isn't in its known list. It writes the domain name to the socket and streams back whatever plain-text response the registry sends, unmodified.

SysAdmin & security use cases

  • Check when a domain you own or are watching is due to expire.
  • Confirm privacy/WHOIS-redaction is actually active on your own domains.
  • Look up the registrar and name servers for a domain before a transfer.
  • Find abuse or registrant contact details for a domain involved in spam or phishing.