mx.paragonlenses.com has no NS records.
NS records for this zone are defined at paragonlenses.com.
NS records for this zone are defined at paragonlenses.com.
Question and response
Question
dig mx.paragonlenses.com. NS
Answer
The response has no answer records.
Authority
paragonlenses.com. 3600 SOA dns.paragonlenses.com. hostmaster.paragonlenses.com. 1914249069 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0