IP WHOIS (ARIN / RDAP)
Find the organisation, network range and abuse contact that owns any public IP address.
Every public IP belongs to an allocated network block registered with a regional internet registry (ARIN, RIPE, APNIC, etc.). This lookup returns the owning organisation, the network name and CIDR range, the country, and the abuse-reporting contact — useful for investigating suspicious traffic or identifying a hosting provider.
Enter an IP address above.
Frequently asked questions
What is the abuse contact for?
It's the address a network operator publishes for reporting abuse (spam, attacks, scanning) originating from their IP range.
Which registry will answer?
The lookup uses RDAP bootstrap, which automatically routes to whichever regional registry (ARIN, RIPE, APNIC, LACNIC, AFRINIC) allocated the address.
Can I look up a domain here?
Use the WHOIS Lookup tool for domains; this one is for IP addresses and networks.