Free tool

WHOIS Domain Lookup

Query registration information for any domain: registrar, creation and expiration dates, nameservers and status. Real-time RDAP data. No sign-up.

Built by

Miguel Ángel Colorado Marin (MACM)

Full-Stack Developer · Guadalajara, España

I develop web apps, digital tools and full projects — from design to deployment.

GitHubLinkedIn
Contact me

How to use the WHOIS Lookup?

  1. 1

    Enter the domain

    Type just the domain (e.g. example.com), without https:// or additional paths.

  2. 2

    Click Analyze

    The tool queries the RDAP protocol to get structured domain registration data.

  3. 3

    Review the information

    Expand Infrastructure to see registrar, dates and nameservers.

  4. 4

    Check expiration

    Verify when the domain expires to avoid losing it through oversight.

Frequently asked questions

What is WHOIS?

WHOIS is a query protocol that provides domain registration information: registrar, creation and expiration dates, nameservers and status. It's a public database maintained by domain registries (ICANN, Nominet, etc.).

What is RDAP and how does it differ from WHOIS?

RDAP is the modern successor to WHOIS. It returns structured JSON data instead of free text, supports HTTPS and internationalized responses. This tool uses RDAP for better reliability.

Why does private or limited information appear?

Many registrars offer WHOIS privacy. With European GDPR since 2018, public information in .com, .net and other generic TLDs has also been reduced.

How do I know when a domain expires?

The expiration date appears in RDAP data. After expiring, the domain enters a grace period (~30 days) then redemption before being released to the public.

Is it legal to query any domain's WHOIS?

Yes. WHOIS is a public service by design — it's the official mechanism for identifying who is responsible for a domain. ICANN itself requires this information to be queryable.

Is it legal to query any domain's WHOIS?

Yes. WHOIS and RDAP are public services by design — ICANN itself requires registrars to provide this queryable information. It's the official mechanism for identifying the technical and administrative contact responsible for a domain. Tools like ICANN's own tool, ARIN, registrars themselves and many SEO tools make exactly the same query.

Embed this tool

Integrate the WHOIS Lookup in your blog or website:

<iframe src="https://miguelacm.es/embed/whois-lookup" width="100%" height="700" style="border:none;border-radius:12px;" loading="lazy"></iframe>

Source code available on GitHub.

View on GitHub

Related tools

Web Analyzer

Full technical audit: DNS, SSL, SEO, email and stack.

DNS Lookup

DNS records: A, AAAA, MX, TXT, NS, CNAME, SOA.

SSL Checker

SSL/TLS certificate: issuer, expiry and grade A+→F.

IP Lookup

IP geolocation: country, ISP, timezone.