[chaps]

This isn't helpful. The comment was specifically asking about the probes, not ICMP traffic.

[kube-system]

Anybody can do this same thing, if you're worried about this, you probably don't want inbound ICMP.

[chaps]

Cool. Thanks. But let's say I do.

[kube-system]

Then there's nothing you can do. If you respond to pings, then others can take note of the responses you send.

[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.

[sgjohnson]

And if you don't respond to pings, a traceroute can still be used to find the hop before yours, which will almost certainly achieve the same result for geolocation purposes.