I'm currently on the Trenitalia TPER 3910 from Ancona to Piacenza. You can find it on trenitalia.com and www.lefrecce.it websites, but not in the RailPlanner, DB (Deutsche Bahn) or Rome2Rio apps. This is crazy frustrating, and makes it so difficult to plan ahead. I got to know about this train at the Ancona train station, 2 minutes before departure, and I caught it 5 seconds before it left the platform.
Best answer by raldertonView original