We pick d.root-servers.net, one of the 13 root servers (1), and ask it about www.gy and learn that gy is delegated to six name servers (2), so we ask ns1.gtt.co.gy where we learn that www.gy is delegated to two name servers, including ns2.sedoparking.com (3), so we ask that one and get the following answer:
At least one of them point to the two IP numbers 82.98.86.173 and 82.98.86.174 together, hereafter referred to as "IP group 1", (example: gsmmarket.ru ).
At least one of them use the two name servers ns1 and ns2.poishi.com together, hereafter referred to as "name server group 2", (example: blits.ru ).
The IP number 82.98.86.174 only
There are several thousand of host names that point to the IP number 82.98.86.174 only (but not 82.98.86.173 ).