mx.leafystone.net has no NS records.
NS records for this zone are defined at leafystone.net.
NS records for this zone are defined at leafystone.net.
Question and response
Question
dig mx.leafystone.net. NS
Answer
The response has no answer records.
Authority
leafystone.net. 3600 SOA dns.leafystone.net. hostmaster.leafystone.net. 1943940270 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0