It is always a good idea to use all available info to cross reference the data because it is always changing. I'm sure there are other sources, but this list is the one I reference 1st for available DVB signals, FTA or not. http://www.global-cm.net/MPEGlistCBandUS.html
Strong DVB signals that have no FTA content are good beacons to align dishes and id satellites.
There is info for Ku and other birds beyond western hemisphere limits on this site as well.