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by numpad0 1429 days ago

  $ dig news.ycombinator.com
  ;; ANSWER SECTION:
  news.ycombinator.com.   1       IN      A       50.112.136.166

  $ dig -x 50.112.136.166
  ;; ANSWER SECTION:
  166.136.112.50.in-addr.arpa. 300 IN     PTR     ec2-50-112-136-166.us-west-2.compute.amazonaws.com.
saving couple keypresses just in case