What happens when you try to connect to either of the 3 server IPs that I get from the irc.swiftirc.net DNS record?

/server 83.149.112.71
/server 174.34.173.51
/server 78.159.100.188

(Reverse DNS entries for above IP addresses)
ixion.nl.eu.swiftirc.net
purple.swiftirc.net
deathknight.net