mta.securedsigning.com has no NS records.
NS records for this zone are defined at securedsigning.com.
NS records for this zone are defined at securedsigning.com.
Question and response
Question
dig mta.securedsigning.com. NS
Answer
The response has no answer records.
Authority
securedsigning.com. 900 SOA ns-1127.awsdns-12.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0