Domain Name Information Lookup
Search WHOIS, RDAP, DNS, and nameserver information for any domain name
Comprehensive Domain & IP Information
Instantly look up registration data, contact details, nameservers, DNS records, and more for any domain name or IP address using WHOIS and RDAP protocols.
WHOIS Lookup
Registrant, registrar, and registration dates for any domain.
RDAP Lookup
Structured registration data via the modern WHOIS successor.
DNS Records
A, AAAA, MX, TXT, NS and other records for any domain.
Nameserver Lookup
See which domains a given nameserver hosts.
IP Address Lookup
Ownership and network data for any IPv4 or IPv6 address.
Domain History
How much historical WHOIS/RDAP we hold for a domain.
Uptime Check
Check whether a website is reachable right now.
Registrars
Browse domain registrars and the domains they manage.
Our Premium Services
For researchers, investigators, and site owners who need more.
Domain History Report
The complete historical WHOIS/RDAP record for a single domain — every snapshot, the ownership-change timeline, and registrar history, delivered as a downloadable report.
Look up a domainPro Website Monitoring
Watch the domains that matter: uptime, DNS changes, and TLS-certificate expiry, all from one setup. We probe each domain live so you see exactly what we see, then notify you the moment a site goes down, its DNS shifts, or its certificate nears expiry. Up to 10 domains.
Start monitoringWhat is WHOIS?
WHOIS is a widely used internet protocol to query databases storing information about registered users of domain names, IP addresses, and autonomous systems. It helps you find owner contact details, registration dates, and nameserver information.
What is RDAP?
RDAP (Registration Data Access Protocol) is the modern successor to WHOIS. It provides a standardized, secure, and more structured way to access registration data, often offering richer information and better privacy controls.
