mx.hostashow.com has no NS records.
NS records for this zone are defined at hostashow.com.
NS records for this zone are defined at hostashow.com.
Question and response
Question
dig mx.hostashow.com. NS
Answer
The response has no answer records.
Authority
hostashow.com. 3600 SOA dns.hostashow.com. hostmaster.hostashow.com. 1781138152 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0