Not sure who to call
Because there are so many TV channels now and different organisations handle them and then these change from time to time and get taken over etc etc, there were times in my old job (TV playout) when I would call up <organisation X> and have to ask sheepishly - "do you uplink [channel name] on DSat?" or similar - even when it was one of the channels we played out... It would happen the other way round as well with other organisations phoning us as saying "have you got a problem with [channel1235]?" to which my answer was "not one of ours I'm afraid....try Sky, Arqiva [or someone else]"
You'd think we'd have a big chart of all this info, but whenever I'd finished updating it, it would change again and my colleagues seemed reluctant to update it...