Many members of the Helpline, myself included, recommend using the timetables at www.bahn.de for virtually anywhere in Europe. They truly are excellent.
However, when doing some research recently to answer a question on another thread, I discovered that at least one route is missing from the DB timetables. While DB lists many times for trains between Venice and Naples, the direct night train is not among them.
I wrote to DB and got this reply: "We do not have access to this train, it is not listed in our timetables." No explanation was given as to why this particular Trenitalia train, as opposed to any other Trenitalia train, is blocked from the DB site.
That led me to wonder if the same thing might be true for other Trenitalia routes, or for routes within any other countries whose national rail systems would deny access to DB for some particular route.
Has anyone else found a route on a country's national rail site that was NOT shown on DB?