How did you choose where to get the IP addresses to block? I guess I'm mostly asking where this problem (i.e. "get all IPs for country X") is on the scale from "obviously solved" to "hard and you need to play catch up constantly".
I did a quick search and found a few databases but none of them looks like the obvious winner.
If you want to test your IP blocks, we have servers on both China and Russia, we can try to take a screenshot from there to see what we get (free, no signup) https://testlocal.ly/
I did a quick search and found a few databases but none of them looks like the obvious winner.