We pick i.root-servers.net, one of the 13 root servers (1), and ask it about anysec.apnic.net and learn that net is delegated to 13 name servers (2), so we ask g.gtld-servers.net where we learn that apnic.net is delegated to eight name servers, including ns4.apnic.com (3), so we ask that one and get the following answer:
All of the two host names that point to the IP number 2001:dd8:6::101 point to the two IP numbers 2001:dd8:6::101 and 203.119.86.101 together, hereafter referred to as "IP group 1".
The IP number 203.119.86.101
All of the two host names that point to the IP number 203.119.86.101 point to IP group 1.