Free WHOIS Lookup

Look up domain registration and ownership details

Enter any domain to query its WHOIS registration data. This tool retrieves registrar information, creation and expiry dates, nameservers, DNSSEC status, and available registrant contact details — giving you a complete picture of a domain's registration history and ownership.

Trusted by teams at

Ramp
Pilot
Vercel
Stripe
Better Auth
SST
OpenCode

How it works

How WHOIS Lookup works

01

Enter a domain name

Type any domain name. No need for a protocol or path — just the bare domain like example.com.

02

Query RDAP registration data

We query the Registration Data Access Protocol (RDAP) — the modern, structured replacement for traditional WHOIS — to retrieve domain registration records from the authoritative registrar.

03

Get ownership and security analysis

The registration data is analyzed for security insights including domain age, upcoming expiry risk, DNSSEC configuration, privacy protection status, and registrar reputation.

Features

What WHOIS Lookup checks

View registrar and registration dates

See which registrar manages the domain, when it was first registered, when it was last updated, and when it expires. Domain age is a key trust signal for security assessments.

Check nameserver configuration

Lists all authoritative nameservers for the domain. Misconfigured or single-provider nameservers can indicate DNS resilience issues or potential hijacking risk.

Verify DNSSEC status

Checks whether DNSSEC (Domain Name System Security Extensions) is enabled, which protects against DNS spoofing and cache poisoning attacks.

Detect privacy protection and registrant details

Shows available contact information for the registrant, admin, and technical contacts. Identifies whether domain privacy/proxy services are in use to mask ownership.

Assess domain expiry risk

Flags domains nearing expiration that could be hijacked if renewal is missed. Expired domains are frequently re-registered by attackers for phishing and brand impersonation.

Use cases

Who should use the free WHOIS Lookup

Security Researchers

Investigate domain ownership during reconnaissance. Check registration dates to identify recently created phishing domains or correlate ownership across related domains.

IT Administrators

Monitor domain registration details and expiry dates to prevent accidental lapses. Verify nameserver and DNSSEC configuration after DNS changes.

Legal & Brand Protection Teams

Identify registrants behind domains that infringe on trademarks or are used in phishing campaigns. Gather registrar and contact data for takedown requests.

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FAQ

Frequently asked questions

Everything you need to know about the free WHOIS Lookup.

Go beyond WHOIS Lookup

This free WHOIS Lookup checks a handful of things. Maced's AI pentest checks thousands.

Get a full autonomous penetration test — including OWASP Top 10, authentication flaws, business logic errors, API security, and more — with a compliance-ready report in hours.

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