mx.dintrab.com has no NS records.
NS records for this zone are defined at dintrab.com.
NS records for this zone are defined at dintrab.com.
Question and response
Question
dig mx.dintrab.com. NS
Answer
The response has no answer records.
Authority
dintrab.com. 3600 SOA dns.dintrab.com. hostmaster.dintrab.com. 1704422887 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0