mx.trozzvalin.net has no NS records.
NS records for this zone are defined at trozzvalin.net.
NS records for this zone are defined at trozzvalin.net.
Question and response
Question
dig mx.trozzvalin.net. NS
Answer
The response has no answer records.
Authority
trozzvalin.net. 3600 SOA dns.trozzvalin.net. hostmaster.trozzvalin.net. 1972189091 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0