mx.flyingacrossamerica.com has no NS records.
NS records for this zone are defined at flyingacrossamerica.com.
NS records for this zone are defined at flyingacrossamerica.com.
Question and response
Question
dig mx.flyingacrossamerica.com. NS
Answer
The response has no answer records.
Authority
flyingacrossamerica.com. 3600 SOA dns.flyingacrossamerica.com. hostmaster.flyingacrossamerica.com. 1356241611 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0