Look up who owns an IPv4 or IPv6 address: network name, organization, address range, CIDR, country and abuse contact, straight from the regional registry.
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About this tool
See who owns an IPv4 or IPv6 address: the network, organization, range and abuse contact.
How to use IP WHOIS Lookup
Enter an IPv4 or IPv6 address.
Click WHOIS lookup. The request is routed to ARIN, RIPE NCC, APNIC, LACNIC or AFRINIC automatically.
Read the network owner, range and abuse contact, and the contacts and remarks below.
Worked example
If an IP address keeps attacking your login page, its WHOIS record shows the hosting company and an abuse email address you can report it to.
What is RDAP?
The Registration Data Access Protocol is the modern, structured replacement for WHOIS used by all five regional internet registries.
Why is the owner a hosting company?
Addresses belong to the network that runs them. A website on a cloud server shows the cloud provider, not the site owner.
IP WHOIS Lookup — See who owns an IPv4 or IPv6 address: the network, organization, range and abuse contact.
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