Knowledgebase: SSL Validation FAQs
What is WHOIS?

WHOIS is a TCP-based query/response protocol which is widely used for querying a database in order to determine the owner of a domain name, an IP address, or an autonomous system number on the Internet.

The WHOIS system originated as a method that system administrators could use to look up information to contact other IP address or domain name administrators (almost like a "white pages").

Comodo uses WHOIS databases to validate site information for the orders it receives.

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