IP WHOIS is a query and response protocol that is used to obtain information about the ownership and registration of an IP address. IP WHOIS is used to determine the registered owner of an IP address and the autonomous system number (ASN) associated with it. The information obtained through an IP WHOIS query typically includes the name and contact information of the registered owner, the date of registration, and the autonomous system number (ASN) associated with the IP address.

The IP WHOIS protocol is implemented by a WHOIS server, which is a database that maintains information about IP addresses and their registered owners. To perform an IP WHOIS query, a client sends a request to the WHOIS server, which then returns the requested information.

IP WHOIS is useful for a variety of purposes, such as resolving IP address conflicts, verifying the ownership of IP addresses, and investigating network security incidents. It is an important tool for network administrators and other individuals who need to manage IP addresses and ensure the security of their networks.