[chaps]

You're missing the point that the question is effectively asking for a list of hosts that they can block.

Edit: they provided a method: https://news.ycombinator.com/item?id=37510063

[kube-system]

I understand that was the initial question. I am saying that is a fools errand. Anyone with a few VPSes, a calculator, and a map can do this. It isn't just ipinfo.io doing this. There are a lot of ip geolocation services.