The WHOIS database tracks the owners of public IP addresses on the Internet. For a given IP address, you can query the database for the following information:
- Owner name and contact telephone number
- Dates of registration
- List of other IP addresses in that range with the same owner
- List of DNS servers associated with that IP range
Read more - WHOIS Lookups
Private and Other Reserved IP AddressesSome IP address ranges are reserved for use on private networks or for Internet research. Attempting to look up these addresses in WHOIS will return an owner such as Internet Assigned Numbers Authority (IANA). However, these same addresses are actually employed on many different home and business networks worldwide.
To find the owner of a private IP address within an organization, contact a system administrator for their network.
Read more - Private IP Address Ranges