WHOIS Lookup
Find domain registration details, ownership, and expiry information.
What is WHOIS?
WHOIS is a query and response protocol used to look up information about registered domain names. When someone registers a domain, their contact information is stored in a WHOIS database maintained by the registrar or registry.
Since the implementation of GDPR in 2018, most personal registrant data is redacted for privacy. However, you can still find useful information including the registrar, registration dates, name servers, and domain status codes.
WHOIS lookups are commonly used to check domain availability, verify ownership, investigate potential trademark conflicts, and troubleshoot DNS issues.
The WHOIS lookup tool retrieves the current registration record for any domain via RDAP, showing registrar, status codes, and key dates.
RDAP: the modern protocol behind the lookup
This tool uses RDAP (Registration Data Access Protocol), the modern replacement for the original WHOIS protocol. RDAP provides structured, machine-readable data, which means the results are presented in a consistent format across registries. Unlike older WHOIS servers, which often returned free-text output that varied in formatting, RDAP delivers standardized fields. This makes it easier to compare records for domains on different TLDs. The switch to RDAP also improves security and supports internationalized domain names. When you query a domain through this tool, the information is fetched in real time from the authoritative registry or registrar that maintains the current record.
What the current record includes
For any domain you query, the tool returns the registrar of record, the domain's current status codes, and the key dates associated with its lifecycle: creation, expiration, and last update. The registrar is the company that manages the domain's registration on behalf of the owner. Status codes, such as clientHold or serverTransferProhibited, indicate restrictions or pending actions on the domain. Dates tell you when the domain was first registered, when it is set to expire, and when the record was last modified. This information is useful for assessing a domain's current registration state.
A boundary: what the tool does not show
Because privacy regulations like GDPR allow registrants to request that their personal details be withheld, many registration records are redacted. This tool cannot reveal those redacted registrant details. It also does not maintain a historical archive of WHOIS records; it reads the current record only. If you need to know who owned a domain two years ago, or want to trace changes in ownership over time, this lookup will not provide that data. The tool is designed for a snapshot of the present, not a timeline of the past.
When to use the lookup with other tools
A WHOIS lookup answers questions about registration, but it says nothing about how a domain is configured. For that, pair it with the DNS lookup tool to see name servers, MX records, and IP addresses. If you want to check whether a domain is already taken before you register it, the WHOIS record is a good first step, but it may be more efficient to use the bulk domain checker when researching multiple names at once. For domains you already manage, the SSL checker can confirm that the security certificate is valid and matches the domain.
Frequently Asked Questions
What is a WHOIS lookup?
A WHOIS lookup queries public databases to find domain registration details including the registrar, creation/expiry dates, name servers, and status.
Is WHOIS information public?
Historically yes, but since GDPR most personal data is redacted. Technical and registrar information typically remains accessible.
Why is WHOIS data redacted?
Privacy regulations like GDPR require registrars to protect personal data. Most registrars now offer free WHOIS privacy protection.
How do I find who owns a domain?
Use a WHOIS lookup tool. If privacy protection is enabled, you may need to contact the registrar directly through their abuse or privacy relay email.