mx4.cyber.net.pk has no NS records.
NS records for this zone are defined at cyber.net.pk.
NS records for this zone are defined at cyber.net.pk.
Question and response
Question
dig mx4.cyber.net.pk. NS
Answer
The response has no answer records.
Authority
cyber.net.pk. 1800 SOA kianchau.ns.cloudflare.com. dns.cloudflare.com. 2397313736 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0