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Whois is a protocol for querying a database of registered nameservers maintained by the Internet Corporation for Assigned Names and Numbers (ICANN). It can be used to determine the domain name registrant's identity and contact information.
The Whois Checker Tool is an online tool that can help you find out who owns a website or IP address.
This tool has been very useful for those who want to know about the ownership of a given website or email address. It is also helpful for those who want to find out if they are being spammed by someone else’s email account or website.
