Wikipedia
DALnet
DALnet is an Internet Relay Chat (IRC) network made up of 33 servers, with a stable population of approximately 8,000 users in about 7,000 channels.
DALnet is accessible by connecting with an IRC client to an active DALnet server on ports 6660 through 6669, and 7000. SSL users can connect on port 6697 as well. The generic round-robin address is irc.dal.net.