We pick a.root-servers.net, one of the 13 root servers (1), and ask it about glenferrielodge.com and learn that com is delegated to 13 name servers (2), so we ask e.gtld-servers.net where we learn that glenferrielodge.com is delegated to four name servers, including ns3.ezydns.net.au (3), so we ask that one and get the following answer:
All of the three domains that use the primary name server ns1.ezydns.net.au use name server group 1. Worth noting is that all of the domains that use name server group 1 use the primary name server ns1.ezydns.net.au.
The five name servers ns1, ns2, ns3, ns4 and ns5.ezydns.net.au together
There are three domains that use name server group 1.
All of those use the primary name server ns1.ezydns.net.au. Worth noting is that all of the domains that use the primary name server ns1.ezydns.net.au use name server group 1.
All of them use the two mail servers mx1 and mx2.ezyexchange.net.au together, hereafter referred to as "mail server group 1". Worth noting is that three of the domains that use mail server group 1 use name server group 1.
The IPv4 number 202.90.41.161 only
There are 14 domains that only use the IPv4 number 202.90.41.161.
Five of them use only the IPv4 number 202.90.41.161. Worth noting is that five of the domains that only use the IPv4 number 202.90.41.161 use mail server group 1.