9 ms·

How did you check they are using CloudFlare?

• radicalriddler 3y ago
  If you check their document request in the browsers network tab, you can see two response headers, cf-cache-status, cf-ray which are appended by Cloudflare.
  • hrrsn 3y ago
    Appending /cdn-cgi/trace is also a good tell. https://www.vultr.com/cdn-cgi/trace https://www.vultr.com/cdn-cgi/trace
  • pushkar2911 3y ago
    Thanks
• gruez 3y ago
  For me, it's because I got a cloudflare interstitial.