1. ~# dig ptr 211.10.196.82.in-addr.arpa @ns1.digitalocean.com +short
  2. roomworks.site.
  3. ~# dig ptr 211.10.196.82.in-addr.arpa @ns2.digitalocean.com +short
  4. roomworks.site.
  5. ~# dig ptr 211.10.196.82.in-addr.arpa @ns3.digitalocean.com +short
  6. roomworks.site.