I know it's kinda late,but there is one more way to find if a site is using Cloudflare append /cdn-cgi/trace to the URL and you will some debug info Ex: http

I know it's kinda late,but there is one more way to find if a site is using Cloudflare append /cdn-cgi/trace to the URL and you will some debug info Ex: https://cloud.digitalocean.com/cdn-cgi/trace https://cloud.digitalocean.com/cdn-cgi/trace https://news.ycombinator.com/cdn-cgi/trace https://news.ycombinator.com/cdn-cgi/trace