WHOIS Lookup
Look up domain registration information using the RDAP protocol. View registrar, dates, nameservers, status codes and DNSSEC status for any domain.
Enter a domain above to look up its registration information.
What is WHOIS?
WHOIS provides public registration data for domains, including the registrar, creation and expiry dates, nameservers and contact information (where available).
RDAP protocol
RDAP (Registration Data Access Protocol) is the modern replacement for WHOIS. It returns structured JSON data and supports secure access over HTTPS.
Status codes
Domain status codes like clientTransferProhibited indicate locks placed by the registrar. Green statuses generally mean the domain is protected from unauthorized changes.
How to Use Domain WHOIS Lookup
The WHOIS Lookup tool queries domain registration databases to retrieve ownership, registrar, creation date, expiration date, and nameserver information for any domain. This is essential for investigating domain ownership, checking availability, and verifying the legitimacy of websites you encounter online.
Open the WHOIS Lookup Tool
Navigate to the Domain WHOIS Lookup from the cybersecurity tools menu. The tool provides a simple input field for entering the domain you want to investigate.
Enter the Domain Name
Type the domain name you want to look up, such as example.com. You can enter domains with any top-level domain extension including .com, .org, .net, country codes, and newer TLDs.
Run the WHOIS Query
Click the lookup button to query the WHOIS database. The tool connects to the appropriate registrar database and returns the available registration information.
Review Registration Details
Examine the results including registrar name, creation date, expiration date, last update date, domain status codes, and nameserver information.
Check Contact Information
Review registrant, administrative, and technical contact details where available. Note that many domains use privacy protection services that mask this information.
Common Use Cases
Investigating Phishing Domains
Check when a suspicious domain was registered and by whom to determine whether it was recently created for phishing or fraud purposes.
Monitoring Domain Expiration
Look up domains you own or depend on to verify their expiration dates and ensure they will not lapse due to missed renewals.
Verifying Business Legitimacy
Research the registration details of a company's domain to confirm it was registered by the expected organization and has been active for a reasonable period.
Competitive Research
Discover when competitor domains were registered, which registrar they use, and what nameservers host their infrastructure.
Pro Tips
- -Domain expiration dates help you monitor whether important domains you own or rely on are approaching renewal deadlines.
- -WHOIS privacy services are legitimate; their presence does not necessarily indicate a suspicious or malicious domain.
- -Check the domain creation date to assess the age of a website. Very recently registered domains sending unsolicited communications may be suspicious.
- -Compare nameserver entries in WHOIS results with expected values to detect unauthorized DNS changes or domain hijacking.
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