ss201.mx2.email has no NS records.
NS records for this zone are defined at mx2.email.
NS records for this zone are defined at mx2.email.
Question and response
Question
dig ss201.mx2.email. NS
Answer
The response has no answer records.
Authority
mx2.email. 900 SOA ns-1034.awsdns-01.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0