It depends from many things. Most important, satellites before V2 cannot transfer data to other satellite, only between SL hub and subscriber, so they basically

It depends from many things. Most important, satellites before V2 cannot transfer data to other satellite, only between SL hub and subscriber, so they basically share AS of this hub, and if you move too far with your SL terminal, you once sure will switched to other hub and other AS. For V2 satellites added sat-sat link, but I have not hear, how large share V2 now, so I think, most links now run in compatible mode. Other thing, for very long time, AS are classless, mean, they could be registered to any Earth GPS coordinate, but could routed via any peer. For example, few years ago happen issue, Rostelecom announced ASNs of 90% of EU providers and for few hours, 90% of EU traffic directed via Russian links. Etc, etc..