FallenKnight covers it nicely, except the Das Wilde bases that were in Omega-55 are now in Liberty.
And I just want to say, Nomads are a very iffy thing. Frankly I would only trust a few people to actually RP them properly... they are slow and methodical and they move with a purpose, they are not pew pew.
That and frankly, I think that if there are too many Nomads around their RP style will decline, the fact that there are so few independent Nomad entities puts individual Nomad characters at risk of becoming cookie cutter RPs.