It ran for some years as a scheduled task on a small handful of servers, but I'm not sure if it's still in use today or even works anymore. If there's enough interest I might consider publishing the code (or sharing it with someone who wants to pick up the mantle). Alternatively it wouldn't be hard for someone to recreate that effort.
I wrote a quick-and-dirty program that reads the authoritative list of all AWS IP ranges from https://ip-ranges.amazonaws.com/ip-ranges.json (more about that URL at the blog post https://aws.amazon.com/blogs/aws/aws-ip-ranges-json/), and creates rules in Windows Firewall to simply block all of them. Granted, it was a sledgehammer, but it worked well enough.
Here's the README.md I wrote for the program, though I never got around to releasing the the code: https://markdownpastebin.com/?id=22eadf6c608448a98b6643606d1...
It ran for some years as a scheduled task on a small handful of servers, but I'm not sure if it's still in use today or even works anymore. If there's enough interest I might consider publishing the code (or sharing it with someone who wants to pick up the mantle). Alternatively it wouldn't be hard for someone to recreate that effort.
G'luck!