What Is WHOIS?
What Is WHOIS and What Is It Used For?
WHOIS is a public lookup service that shows registration details for a domain name, such as the registrar that manages it, when it was created and when it expires. Anyone can run a lookup with a web tool or a command-line client, because the registry and registrar that manage each domain publish this data.
People use WHOIS to check whether a name is still taken, to find out who runs a site or to trace suspicious domains.
Which Details Appear in a WHOIS Record?
A typical record lists the registrar, the creation, update and expiration dates, the domain's status codes and its nameservers. Nameservers point the domain to the DNS servers that control its website and email.
Older records also show contact details for the registrant, who is the legal owner, along with administrative and technical contacts. The exact fields depend on the extension and the registrar. Status codes describe what the registry currently allows, such as whether a domain can be transferred. They are explained in EPP status codes.
Why Personal Data in WHOIS Records Has Changed
For many years, contact details in public WHOIS records were visible to anyone. After the European General Data Protection Regulation (GDPR) took effect in 2018, ICANN, the body that coordinates domain policy, required registries and registrars for most generic extensions to hide personal data from public results by default.
Many records now show a redacted placeholder instead of an individual's name, email and address. The registrar still shows the management details, and requests for hidden data can be made through defined channels for legitimate purposes. The newer RDAP protocol is gradually replacing WHOIS, and privacy services offer a separate way to hide contact details.
Frequently asked questions
Is WHOIS data always accurate?
Not always. Registrants must provide accurate contact details, and registrars must respond to reports of false information, but the data is self-reported and can be out of date. Many records also hide contact details behind privacy or redaction. Treat a WHOIS record as a starting point for research, not as proof of who runs a website.
Can anyone look up a WHOIS record?
Yes. Public WHOIS and RDAP lookups are open to anyone without an account. Services may limit how many queries a single user can make in a short time, and some registries restrict bulk searches to prevent data harvesting and spam.
Why does a WHOIS record show a redacted name?
Most generic domains now hide the registrant's personal details by default under data protection rules. The record still shows the registrar, the key dates and the nameservers. To reach the owner, you usually use a web form or an anonymized email address.