Free WHOIS Checker — Domain Registration Lookup via RDAP
Look up any domain's registrar, creation date, expiry date, name servers, and status in real time using modern RDAP protocol.
Why WHOIS Lookup Is Useful
What Data This Lookup Returns
We query RDAP (Registration Data Access Protocol) — the modern, structured replacement for legacy WHOIS.
The company where the domain is registered
Owner name when not privacy-protected
Domain registration date and age in days
Expiry date and days remaining countdown
DNS infrastructure hosting the domain
Date of most recent registration record change
ICANN status flags — active, locked, pendingDelete
WHOIS Privacy and What It Means
Most domains display proxy data instead of real owner details — here is what that means.
Privacy Protection Is Standard
Most registrars include WHOIS privacy by default. ICANN's post-GDPR policies made it standard practice across nearly all TLDs.
Privacy Does Not Indicate Suspicious Intent
Most legitimate businesses use WHOIS privacy. The presence of a proxy registrar is not itself a red flag — look at domain age and name servers instead.
Legitimate Lookup Paths Still Exist
For legal or trademark disputes, ICANN's UDRP process allows access to non-public registrant data. Contact the registrar's abuse team for abuse-related requests.
Focus on Age and Infrastructure
For email and deliverability purposes, domain age and name server configuration are more useful than registrant name — both remain visible even when privacy is on.
Newly Registered + Privacy = Extra Caution
A domain under 30 days old with privacy protection is the highest-risk combination. Treat these with the same caution as unverified addresses.
Who Uses Domain WHOIS Lookup
WHOIS data is used across security, legal, sales, and technical teams.
Email deliverability teams assessing sender domain age before warm-up
Sales and BD teams researching company domain ownership
Security researchers tracing phishing or impersonation domains
Domain buyers checking expiry and current ownership
Legal teams verifying domain ownership in trademark disputes
How to Use WHOIS Results
Different WHOIS findings call for different actions.
Domain Age Under 30 Days
Treat with high caution. Newly registered domains are the most common vector for phishing and spam campaigns. Suppress from marketing lists and verify before any transaction.
Expiry Within 30 Days
The domain may lapse. If you are sending to contacts on this domain, flag them for re-verification. If you own it, renew immediately through your registrar.
Status: pendingDelete
The domain is in its final 5-day deletion period. It will soon become available for registration. Monitor for potential re-registration if it is related to your brand.
Name Servers Pointing to Parking
A parked domain typically means it is inactive or for sale. Email sent to addresses on parked domains usually bounces or reaches no one.
Status: serverHold
The registry has suspended the domain for policy violations. Sending to addresses on a serverHold domain is highly likely to result in bounces or delivery to unintended parties.
Frequently Asked Questions
What is a WHOIS lookup?
A WHOIS lookup retrieves domain registration data — including registrar, creation date, expiry date, name servers, and domain status. This tool uses RDAP (Registration Data Access Protocol), the modern structured replacement for the legacy WHOIS protocol, providing more consistent and machine-readable results.
What is RDAP and how is it different from WHOIS?
RDAP is the IANA-standardized successor to WHOIS. It returns structured JSON responses, supports internationalized domain names (IDNs) natively, includes built-in rate limiting, and provides more consistent data formatting across registrars. ICANN has required registrar support for RDAP since 2019.
Why is the registrant name hidden or showing a privacy proxy?
Most registrars offer WHOIS privacy (also called domain privacy or RDAP redaction). When enabled, the registrant's personal contact details are replaced with the registrar's or a proxy service's details. ICANN's 2018 Temporary Specification following GDPR made privacy protection standard practice. The domain is still owned by a real entity — contact details are just shielded from public display.
How do I find the owner of a domain with WHOIS privacy enabled?
For legitimate legal or abuse-related requests, contact the registrar directly using their abuse or legal contact email. For UDRP (trademark disputes), ICANN's process allows access to non-public registrant data. General public lookup of privacy-protected registrant details is intentionally not available under GDPR-aligned policies.
What does domain age tell me about email deliverability?
Domain age is a key trust signal for inbox providers. Domains under 30 days old have no sending history and are treated with high suspicion — they are commonly used in phishing and spam campaigns. A domain older than 6–12 months with consistent sending history is considered more trustworthy. Always warm up new domains before high-volume sending.
What do the domain status codes mean?
- active — domain is live and resolving normally
- clientTransferProhibited — registrar has locked transfer to prevent unauthorized moves
- pendingDelete — domain is in the 5-day deletion period before becoming available
- redemptionPeriod — expired domain is in 30-day redemption window (owner can pay to recover)
- serverHold — registry has suspended the domain, usually for policy violations
What should I do if a domain I'm emailing expires soon?
If a domain you are sending to expires within 30 days, that contact is at risk of becoming invalid. Expired domains often get re-registered by third parties, meaning your email may reach someone completely unintended. Mark these contacts for re-verification or suppression using EmailVerify.io before your next send.
Can I use WHOIS data to identify fake or disposable company domains?
Partially. Very recently registered domains (under 30–90 days), domains registered through anonymous privacy proxies with generic company names, and domains whose name servers point to parking or redirect services are all indicators of low-quality registrations. WHOIS data is one signal — combine it with email verification and MX record analysis for full assessment.
Why does WHOIS sometimes return 'Not Found' for a real domain?
Some registrars or registries do not publish RDAP data for all TLDs yet. Country-code TLDs (ccTLDs) like .uk, .de, or .br may have their own regional RDAP endpoints not covered by the standard RDAP bootstrap. If a domain appears active in DNS but shows Not Found here, the TLD registry may not participate in RDAP.
Does this tool store the domain names I look up?
No. Lookups are performed in real time via RDAP and no domain data is retained after your session.