Available Implementations

Working RWhois server
rwhois.ip4.int(198.32.4.24, port 43 & 4321)
rwhois.ip6.int(3ffe:801::a00:20ff:fe23:55b8, port 43 & 4321)

Softwares
http://www.isi.edu/~sekiya/rwhois/

Web Client
http://www.isi.edu/~sekiya/rwhois/