There are still more clans than you could ever imagine. Ever visited TSF? But as for 1.23 clans.. I think there are only about 10 left. A few ones I still see members of sometimes or frequently; EL, TNC, CC, GpW, DM, JOL, NC and NW. Empire of Light, The New Craccos, Cracco Clan, Gurus of Proactive Warfare, Dark Mercenaries, Jazz2Online, No Clan, and I forgot where NW stands for, but I know that Sauron is the leader.

I know the member lists of EL, TNC, CC and NW, I have an outdated one of JOL as well, but I don't know about DM, NW or GPW.