WHOIS Lookup
Get detailed registration information for any domain name. Enter a domain to see its registrar, registration date, expiration date, and more.
Registered
Registration Information
Nameservers
Registrant Contact
Administrative Contact
Technical Contact
Additional Info
Raw WHOIS Response
How to Use WHOIS Lookup
- Enter a domain name in the search box above (e.g.,
example.com,github.com). - Click "Lookup" or press Enter to start the query.
- View registration details including registrar, creation date, expiration date, nameservers, and contact information.
- Scroll down to see the raw WHOIS response for full technical details.
- Click "Share" to copy a direct link to the result and share it with others.
When to Use WHOIS Lookup
Domain Research
Before purchasing a domain, check its registration history, current owner, and expiration date to evaluate its value and availability.
Security Investigation
Investigate suspicious domains involved in phishing, spam, or malware. Identify the registrar and report abuse contacts quickly.
Legal & Compliance
Verify domain ownership for trademark disputes, copyright infringement cases, or contractual due diligence.
Technical Troubleshooting
Confirm nameserver configurations and check if DNS propagation issues are related to recent domain updates.
Business Due Diligence
Verify that a company owns the domain they claim before entering a business relationship or acquisition.
Key Concepts Explained
What is WHOIS?
WHOIS is a query-and-response protocol used to retrieve information stored in databases related to registered domain names, IP address blocks, and autonomous systems. It was originally defined in RFC 954 (1985) and later updated in RFC 3912. A WHOIS lookup contacts a registry's WHOIS server on TCP port 43 and returns plain-text records about the domain's registrant, registrar, and key dates.
Due to privacy regulations such as GDPR, many registrars now redact personal contact data. You may see placeholder text like "Data Redacted" or "Please query the RDDS service" in place of actual contact details.
What is RDAP?
RDAP (Registration Data Access Protocol) is the modern successor to WHOIS, standardized by the IETF in RFC 7480–7484. Unlike WHOIS, RDAP returns structured JSON data over HTTPS, supports internationalized domain names (IDNs), provides standardized error codes, and includes built-in support for access control and data redaction notices.
ICANN mandated RDAP support for all accredited registrars since 2019. Our tool queries RDAP first for accurate structured data, then falls back to WHOIS for additional raw details.
What is a Registrar?
A domain registrar is an organization accredited by ICANN (or a national registry) to sell and manage domain name registrations. Examples include GoDaddy, Namecheap, and Google Domains. The registrar acts as an intermediary between the domain owner and the registry that maintains the authoritative database for a given TLD (Top-Level Domain).
What are Nameservers?
Nameservers (NS records) are the servers responsible for translating a domain name into an IP address via the Domain Name System (DNS). They are set by the domain owner at the registrar and typically come in pairs for redundancy (e.g., ns1.example.com and ns2.example.com). Changing nameservers can take up to 48 hours to propagate globally.
Frequently Asked Questions
Why is the registrant contact information redacted or hidden?
Since GDPR came into effect in 2018, many domain registrars are required to redact personal contact information (name, email, phone) from public WHOIS records. This is known as WHOIS privacy or proxy registration. The domain is still registered and owned by someone, but their personal details are protected. You can contact the registrar directly to report abuse.
How accurate and up-to-date is the WHOIS data?
Our tool fetches data in real time directly from official RDAP endpoints and WHOIS servers. However, there can be a short propagation delay (minutes to a few hours) after a domain is registered, transferred, or updated before changes appear in the public databases.
Can I look up any type of domain extension (TLD)?
Most generic TLDs (.com, .net, .org, .info, etc.) and many country-code TLDs (ccTLDs) are supported. Some ccTLDs (such as .de, .uk, .jp) have their own regional WHOIS servers or may restrict public access to registration data. If a lookup fails for a specific TLD, it may not be publicly accessible.
What is the difference between "Registration Date" and "Creation Date"?
These often refer to the same event — when the domain was first registered. Some registries use "Creation Date" in their RDAP/WHOIS records, while others use "Registration Date." We display both fields when available. If they differ, "Creation Date" typically reflects the original registry record, while "Registration Date" may reflect the current registrar's record.
What does "clientTransferProhibited" domain status mean?
Domain status codes beginning with "client" are set by the registrar. clientTransferProhibited means the domain cannot be transferred to another registrar without the current registrar removing this lock. This is a common security measure to prevent unauthorized domain hijacking. Other common statuses include clientDeleteProhibited and clientUpdateProhibited.
Is there a limit to how many lookups I can perform?
Our tool does not impose strict per-user limits for normal use. However, the underlying WHOIS servers and RDAP endpoints operated by registries may rate-limit repeated queries from the same IP. If you receive an error, please wait a few minutes before trying again.
Can I use WHOIS data to contact a domain owner?
If contact details are visible (not redacted), you may use them to reach out. However, many domains now display a privacy-protected proxy email. In that case, sending a message to the proxy email will be forwarded to the actual owner if they choose to reply. Always respect anti-spam laws when making contact.