Good VPN services use a number of tricks to help disguise their efforts. It's a bit like the virus / anti-virus wars, changes needed and implemented on a regular basis.
There's no "set IP addresses", and the better ones will change those regularly. Users aren't usually aware of that.
Some of the more determined content providers seem to be keeping an eye on IP's used though - easy enough, just subscribe and then keep checking the usage thoroughly. I've only come across one case of this.
But as we have both seen, there is some sort of organised attempt to prevent VPN use going on in a few places - you saw India, I saw Pakistan and Russia. In the end it strongly helps protect privacy though, so doubt they can make a dent in gaining control.
Only 2 or 3 VPN's are really tops. Most on the forum usually first recommend Windscribe, me too.