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
Does Twitter use Cloudflare? I hate anything Elon and want him to fail, but it would be kinda crazy for the CEO of a company I use services with to broadcast an embarrassing indicator to the world that my business isn’t going well.