We pick j.root-servers.net, one of the 13 root servers (1), and ask it about ns4.mompopmedia.com and learn that com is delegated to 13 name servers (2), so we ask l.gtld-servers.net where we learn that mompopmedia.com is delegated to four name servers, including ns4.mompopmedia.com (3), so we ask that one and get the following answer:
All of the three host names that point to the IP number 74.54.22.183 point only to that ip number.
The IP number 74.54.22.183 only
All of the three host names that point only to the IP number 74.54.22.183 use the two name servers ns1 and ns2.mompopmedia.com together, hereafter referred to as "name server group 1". Worth noting is that three of the domains that use name server group 1 point only to the IP number 74.54.22.183.
The four name servers ns1, ns2, ns3 and ns4.mompopmedia.com together
Six of the seven domains that use the four name servers ns1, ns2, ns3 and ns4.mompopmedia.com together, hereafter referred to as "name server group 2", point only to the IP number 74.54.22.178.
The name server ns4.mompopmedia.com
Seven of the nine domains that use the name server ns4.mompopmedia.com use name server group 2.
The two name servers ns1 and ns2.mompopmedia.com together