We pick b.root-servers.net, one of the 13 root servers (1), and ask it about useapk.org and learn that org is delegated to six name servers (2), so we ask a0.org.afilias-nst.info where we learn that useapk.org is delegated to two name servers, including ns.dsl.net.pk (3), so we ask that one and get the following answer:
Useapk.org is a domain controlled by two domain name servers at net.pk. Both are on the same IP network. Incoming mail for useapk.org is handled by four mail servers at nayatel.com and net.pk. All four of them are on different IP networks. Useapk.org has one IP number (203.82.48.6), but the reverse is isb.dsl.net.pk.
Eight of them use the three name servers ns, ns1 and ns2.dsl.net.pk together, hereafter referred to as "name server group 2", (example: jsi.org.pk, ipdf.gov.pk and ingad.org.pk ). Worth noting is that eight of the domains that use name server group 2 use the primary name server ns.dsl.net.pk.
The two name servers ns and ns1.dsl.net.pk together
There are about ninety domains that use name server group 1.
