mx.40inchplus2.com has no NS records.
NS records for this zone are defined at 40inchplus2.com.
NS records for this zone are defined at 40inchplus2.com.
Question and response
Question
dig mx.40inchplus2.com. NS
Answer
The response has no answer records.
Authority
40inchplus2.com. 3600 SOA dns.40inchplus2.com. hostmaster.40inchplus2.com. 1229172461 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0