smtp-gw.rapidsupport.com.pk has no NS records.
NS records for this zone are defined at rapidsupport.com.pk.
NS records for this zone are defined at rapidsupport.com.pk.
Question and response
Question
dig smtp-gw.rapidsupport.com.pk. NS
Answer
The response has no answer records.
Authority
rapidsupport.com.pk. 1800 SOA shane.ns.cloudflare.com. dns.cloudflare.com. 2399058511 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0