mx.vfbands.com has no NS records.
NS records for this zone are defined at vfbands.com.
NS records for this zone are defined at vfbands.com.
Question and response
Question
dig mx.vfbands.com. NS
Answer
The response has no answer records.
Authority
vfbands.com. 3600 SOA dns.vfbands.com. hostmaster.vfbands.com. 1465872291 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0