http://www.rfc-editor.org/rfc/rfc1834.txt
RFC 1834: Whois and Network Information Lookup Service, Whois++, J. Gargano, K. Weiss1995-08-01T23:00:00-00:00This memo describes new features for WHOIS. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.