For sure, it would be nice to be able to find out this kind of data all ovre the world.

The problem is that each operator (if it provides the service to the public) has its own web site, with a different interface and probably different kind of data. So, while doing the work for a single operator can reasonably be done as a few evening project, doing the same globally is a much harder work.

I do not exclude the possibility of extending the program to other operators/networks, if I find out the data to be available, but it is too early for me to tell...

It could be useful to collect railways online services pointers somewhere. If you know online services, let me knowof them.