mail.belvatorix.com has no NS records.
NS records for this zone are defined at belvatorix.com.
NS records for this zone are defined at belvatorix.com.
Question and response
Question
dig mail.belvatorix.com. NS
Answer
The response has no answer records.
Authority
belvatorix.com. 3600 SOA dns.belvatorix.com. hostmaster.belvatorix.com. 1413943422 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0