Yeah, that’s pretty interesting! You can also see a live view of the ASN/ISP leaderboard by going to https://knock-knock.net and choosing ISP from the carousel. That’s ordered by bot transaction count rather than IP count though.
It never ceases to amaze me that these ISPs don’t bother to shut down the botnets. They could do so very easily. For example, they could identify the IP address of every bot that hit this honeypot with their ASN with one API call: https://api.knock-knock.net/check-asn?asn=<asn number>. (See https://knock-knock.net/api). They just don’t care!
What if I have a slimy TV box or nasty on my phone, living on my network?
You take IP down, you kill the cancer but you also end up killing the patient.
The ISP's do not have a financial incentive to shut them down. To them that's a paying customer. The feds will go after the big botnets if they are touching financial networks or siphoning enough money from people because there is usually a few big bank accounts and virtual currency exchange accounts they can seize once big enough to look good in the media. That's why it's on us and a few big CDN's to block some of them.