I was trying to look into a minor issue with my mother's wifi router, but not remembering the password I attempted to log in a bit too much. When it stopped connecting to the internet at all I had apparently broken it completely and I tried to fix it for quite a while. Two resets and reconfiguring later we had finally internet back. Then we read on that internet that there had been a big outage with several service providers where their routes to Google had been broken, many people reporting problems.

So the conclusion is clear: Google's routes run through my mother's wifi router.