mx.hiyyas.com has no NS records.
NS records for this zone are defined at hiyyas.com.
NS records for this zone are defined at hiyyas.com.
Question and response
Question
dig mx.hiyyas.com. NS
Answer
The response has no answer records.
Authority
hiyyas.com. 3600 SOA dns.hiyyas.com. hostmaster.hiyyas.com. 1697733692 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0