We pick d.root-servers.net, one of the 13 root servers (1), and ask it about best-computer-deals.net and learn that net is delegated to 13 name servers (2), so we ask m.gtld-servers.net where we learn that best-computer-deals.net is delegated to two name servers, including ns1.realitychecknetwork.com (3), so we ask that one and get the following answer:
There are five host names that point to the IP number 220.127.116.11.
All of those point only to that ip number.
Two of them use name server group 1.
The IP number 18.104.22.168 only
Two of the five host names that point only to the IP number 22.214.171.124 use name server group 1. Worth noting is that two of the domains that use name server group 1 point only to the IP number 126.96.36.199.