We pick b.root-servers.net, one of the 13 root servers (1), and ask it about nonhosonno.it and learn that it is delegated to six name servers (2), so we ask nameserver.cnr.it where we learn that nonhosonno.it is delegated to two name servers, including ns2.parkingcrew.net (3), so we ask that one and get the following answer:
The two name servers ns1 and ns2.parkingcrew.net together
Most of the several hundred of domains that use name server group 1 point only to the IP number 62.116.181.27 (example: chloa.com, datingpenpals.com and fluar.com ). Worth noting is that all of the host names that point only to the IP number 62.116.181.27 use name server group 1.