We pick a.root-servers.net, one of the 13 root servers (1), and ask it about ibet1888.net and learn that net is delegated to 13 name servers (2), so we ask a.gtld-servers.net where we learn that ibet1888.net is delegated to two name servers, including sk.s5.ans1.ns52.ztomy.com (3), so we ask that one and get the following answer:
The two name servers sk.s5.ans1.ns52.ztomy.com and sk.s5.ans2.ns52.ztomy.com together
All of the several thousand of domains that use name server group 1 point only to the IP number 141.8.224.106 (example: tinuryl.com, sparkase.com and barebaked.com ). Worth noting is that two thirds of the host names that point only to the IP number 141.8.224.106 use name server group 1.