We pick c.root-servers.net, one of the 13 root servers (1), and ask it about itconsult-dns.biz and learn that biz is delegated to six name servers (2), so we ask b.gtld.biz where we learn that itconsult-dns.biz is delegated to five name servers, including a.itconsult-dns.net (3), so we ask that one and get the following answer:
The five name servers e.itconsult-dns.biz, c.itconsult-dns.je, a.itconsult-dns.net, b.itconsult-dns.…
Seven of the more than two hundred domains that use name server group 1 point only to the IP number 213.167.65.46 (example: c5alliance.com, c5.gg and c5.je ).