rt.com does not use Cloudflare, they are a customer of DDOS Guard:

  $ drill -Q rt.com | tee $(tty) | xargs whois | grep org-name
  91.215.41.4
  org-name:       DDOS-GUARD LTD

  $ curl --silent https://www.rt.com | grep '<title>[^<]\*</title>' | head -1
  <title>RT - Breaking News, Russia News, World News and Video</title>