mx.banknoteprinters.info has no NS records.
NS records for this zone are defined at banknoteprinters.info.
NS records for this zone are defined at banknoteprinters.info.
Question and response
Question
dig mx.banknoteprinters.info. NS
Answer
The response has no answer records.
Authority
banknoteprinters.info. 3600 SOA dns.banknoteprinters.info. hostmaster.banknoteprinters.info. 1410095875 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0