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by aduitsis 1717 days ago

  dig +trace messenger.com
shows that all is well with the root DNS servers and

  dig @a.ns.facebook.com messenger.com
  ;; connection timed out; no servers could be reached
and also

  ping a.ns.facebook.com
  3 packets transmitted, 0 packets received, 100.0% packet loss
shows that something's wrong with facebook.