I know that these clans are alive, because I see them frequently or still hear much from them. CC (Cracco Clan), TEC (The Elemental Clan), UR (Ultra Rabbits), TNC (The New Craccos), LD (Legend of Dragoon), GpW (Gurus of Proactive Warfare), * (Hybrids), SC (Stileto Clan) DL, Txl, and probably Tbt, DB, X and JOL.
I'm not sure if these are ALL clans alive though.