From MIXXnet Wiki
Blackdiamond is a MIXXnet server located in New York City, New York, USA. It is operated by Levi Junkert (Junkman).
Blackdiamond supports full SSL connectivity (traffic from user to server and traffic from server to hub is encrypted), and is included in the round-robin "irc.ssl.mixxnet.net".
Ports: 6667, 6697 (SSL), 7000