DNS delegation of a.co.nz updated: May 23, 2013 8:29:39 AM
We pick l.root-servers.net, one of the 13 root servers (1), and ask it about a.co.nz and learn that nz is delegated to seven name servers (2), so we ask ns1.dns.net.nz where we learn that a.co.nz is delegated to three name servers, including ns1.ukservers.net (3), so we ask that one and get the following answer:
A.co.nz is a domain controlled by three domain name servers at ukservers.net. All three of them are on different IP networks. Incoming mail for a.co.nz is handled by two mail servers also at ukservers.net. Two mail servers have the same IP number.