We pick l.root-servers.net, one of the 13 root servers (1), and ask it about oilsandsservices.com and learn that com is delegated to 13 name servers (2), so we ask c.gtld-servers.net where we learn that oilsandsservices.com is delegated to two name servers, including ns46.domaincontrol.com (3), so we ask that one and get the following answer:
Oilsandsservices.com is delegated to nine domain name servers, however all nine delegated name servers are missing in the zone. We are missing the IP:s of two servers: ns3.everydns.net and...