IP WHOIS Lookup
Find allocation and registration information.
An IP WHOIS lookup queries the regional internet registry, through RDAP, for the record covering an address. It returns the organisation the block is allocated to, the range it belongs to, and the abuse contact — the operator, not the end user.
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Public internet targets onlyResults
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Enter your details above and run the tool.
How IP WHOIS Lookup works
What it does
Find allocation and registration information.
What you get
Network allocation and registration data from RDAP.
Live data sources
The target is sent to a network provider. Results include their source; timeouts and unavailable data are clearly marked.
What if a check cannot finish?
Confirm your input and try again. A timeout, blocked request, or unavailable provider is not proof that a domain is broken. Internet measurements and third-party services have limits.
IP WHOIS Lookup — frequently asked questions
Does this tell me who was using the IP address?
No. It identifies the organisation the block is allocated to, typically a provider or hosting company. Which customer held it at a given moment is internal to them.
What is RDAP and why not classic WHOIS?
RDAP is the structured JSON replacement for text WHOIS. It returns consistent, parseable fields and is what the registries now actively maintain.
Where do I report abuse coming from an IP?
To the abuse contact in this record. Include timestamps with time zones and log excerpts — a report without them is usually not actionable.