I know how sketchy it sounds, and it was even documented in DB Navigator. But DB makes this information inaccessible a couple of days later in the app, so there is no way to „proof“ it except asking DB itself.

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raphman 8 hours ago | parent [-]

Just to be sure: your blog post mentions 24.12.2024 - did you mean 2025?

Is this the right connection?:

https://bahn.expert/details/NX%2028521/j/20251224-a0049123-9...

The RE5 seems to be operated by National Express, not Deutsche Bahn, right? (but DB InfraGo is most probably responsible for the routing)

	▲	JeremyTheo 5 hours ago \| parent \| next [-]
		Yes it is! And yes it was a typo! Thank you for finding the link to it. I was trying to find it before but couldn’t find it in official sources, DB deleted it from the official app. It did not stop at Troisdorf though. It is operated by National Express, but I guess the routing comes from some other company (likely InfraGo)
	▲	kioleanu 5 hours ago \| parent \| prev [-]
		Well I’ll be damned, I’ve really seen it all, OP sorry for doubting w