https://radar.cloudflare.com/domains

Source of this is from Matthew Prince, Co-founder & CEO of Cloudflare posted at 11:34 Jul 9,2023. It was posted to his twitter (@eastdakota). Not linking to twitter bc don’t want a deadlink next time twitter makes API changes. And not to drive traffic to twitter :D

Edit: July 11th update, arstechnica published a detailed explanation

https://arstechnica.com/tech-policy/2023/07/twitter-is-tanking-amid-threads-surging-popularity-analysts-say/