We pick f.root-servers.net, one of the 13 root servers (1), and ask it about redirector-sjl.enom.com and learn that com is delegated to 13 name servers (2), so we ask g.gtld-servers.net where we learn that enom.com is delegated to three name servers, including dns11.enom.com (3), so we ask that one and get the following answer:
Three of the about a hundred host names that point only to the IP number 98.124.253.221 use the three name servers ns1, ns2 and ns3.darktech.org together.