Junior,
Burt said most of it. Here are the rest of the bases. The CRJ is ORD and DFW. The ATR is MIA and SJU. The EMB is LAX, DFW, ORD, BOS, and LGA.
Everything else he said about bidding is true. You never know where you will end up until you get hired and start training. It all depends on where the comany needs pilots. You are seat locked in your intial equipment as a new hire. This means you can not bid out of a particular airplane for 1 year. You may change bases, just not airplanes. Good luck!