mx.asnerironandmetal.com has no NS records.
NS records for this zone are defined at asnerironandmetal.com.
NS records for this zone are defined at asnerironandmetal.com.
Question and response
Question
dig mx.asnerironandmetal.com. NS
Answer
The response has no answer records.
Authority
asnerironandmetal.com. 3600 SOA dns.asnerironandmetal.com. hostmaster.asnerironandmetal.com. 1444380348 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0