I use an o2 DSL connection in Berlin. The domains I tested seem to resolve fine. And you can of course configure an alternate DNS. Which apparently I didn't yet on my new laptop. So, that is fixed now. Mostly that's just a performance fix. Operator DNS tends to be a bit slow to respond and it's nice to get back a few milliseconds. But I also don't mind my operator not spying on me.

Of course I also use Firefox so mostly that just bypasses the system DNS entirely and uses dns over https.