Is that one actually stil active and being used?
This is the information found on the old Trek-RPG.Net site:
The channel is #TrekRPG and is found on Undernet. For a list of Undernet servers and IRC clients see http://www.undernet.org.
The channel is permanently registered and is online 24/7! Common meeting times online are 9 pm, EST.
As far as I know, Allen S. still is active here