WHOIS Online — Look up domain registration data
Registrar, expiration date, nameservers, status and DNSSEC for any domain via RDAP. Official data, no signup.
Look up a domain
Enter a domain name to retrieve public registration data via RDAP (Registration Data Access Protocol), the successor of the classic WHOIS used by registries and registrars worldwide.
Data is provided via the RDAP protocol (Registration Data Access Protocol), the modern successor of classic WHOIS. Contact details may be redacted for GDPR compliance.
What a WHOIS/RDAP response contains
A WHOIS/RDAP response provides several pieces of information valuable for system administrators, IT managers and security teams. Knowing what each field means lets you assess a domain's status and configuration in seconds.
Registrar
The ICANN-accredited company where the domain is registered. Useful to identify the provider for renewals and transfers.
Dates
Registration, last updated and expiration dates. Expiration is the most critical value to plan renewals and avoid losing the domain.
Nameservers
The authoritative DNS servers delegated for the domain's zone. They show where actual DNS records (A, MX, TXT, etc.) are published.
Status
EPP flags describing the domain's state: clientTransferProhibited, serverHold, ok, etc. Useful to diagnose locks or restrictions.
DNSSEC
Indicates whether the zone is digitally signed. A DNSSEC-signed zone is protected against cache poisoning and DNS spoofing attacks.
Contacts
Registrar and abuse contact emails. Owner contacts are typically redacted for GDPR compliance.
To inspect the DNS records published on the nameservers, use our DIG online. For professional DNS management with DNSSEC, SPF, DKIM and DMARC, see DNS Management and Secure DNS.
Frequently asked questions about WHOIS and RDAP
Answers to common questions about WHOIS, RDAP and GDPR compliance.
WHOIS is a protocol that lets you look up the public registration data of a domain: who the registrar is, when it was registered, when it expires, which nameservers it uses and whether DNSSEC is enabled. It is an essential tool for system administrators, IT managers and security teams to verify domain identity and status.
RDAP (Registration Data Access Protocol) is the modern successor of classic WHOIS. It uses HTTP/JSON instead of the legacy text protocol on TCP port 43, supports authentication and CORS, and returns structured data. ICANN requires all accredited registries and registrars to offer RDAP. This tool uses RDAP for accurate, up-to-date data.
Since GDPR took effect in 2018, EU registries and many international registrars redact personal contact data (registrant, admin, tech) in public WHOIS/RDAP responses. The data remains available via a justified request through the registrar or via dedicated ICANN procedures.
The German registry DENIC has discontinued public WHOIS for .de domains in compliance with GDPR. To look up a .de domain you must use the official denic.de portal or go through your registrar. The RDAP tool clearly signals the lack of service for this TLD.
The tool displays the expiration date extracted from the RDAP record and computes the remaining days. If the expiry is within 30 days an amber "Expiring soon" badge is shown; if already passed a red "Expired" badge is shown. We recommend enabling auto-renewal at your registrar to manage renewals safely.
Professional domain and DNS governance for your business
Domain registration, renewals, transfers, managed DNS with DNSSEC and email protection (SPF, DKIM, DMARC): we handle the complete governance of your domains. Contact us for a consultation.