We pick d.root-servers.net, one of the 13 root servers (1), and ask it about unipress.com.ua and learn that ua is delegated to six name servers (2), so we ask pch.ns.ua where we learn that com.ua is delegated to five name servers, including nix.ns.ua (3), so we ask that one and learn that unipress.com.ua is delegated to two name servers (4), so we ask ns11.retrovps.com and get the following answer:
All of the five domains that use the primary name server ns.serv.lt use name server group 1. Worth noting is that five of the domains that use name server group 1 use the primary name server ns.serv.lt.
The two name servers ns11.retrovps.com and ns.serv.lt together
There are about twenty domains that use name server group 1.
Seven of them use only the IPv4 number 176.31.143.250. Worth noting is that seven of the domains that only use the IPv4 number 176.31.143.250 use name server group 1.
Seven of them point only to the IP number 176.31.143.250.
The IPv4 number 176.31.143.250 only
There are 13 domains that only use the IPv4 number 176.31.143.250.