mx.levondrnoyan.com has no NS records.
NS records for this zone are defined at levondrnoyan.com.
NS records for this zone are defined at levondrnoyan.com.
Question and response
Question
dig mx.levondrnoyan.com. NS
Answer
The response has no answer records.
Authority
levondrnoyan.com. 3600 SOA dns.levondrnoyan.com. hostmaster.levondrnoyan.com. 1834932875 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0