mercury.cleverreach.com has no NS records.
NS records for this zone are defined at cleverreach.com.
NS records for this zone are defined at cleverreach.com.
Question and response
Question
dig mercury.cleverreach.com. NS
Answer
The response has no answer records.
Authority
cleverreach.com. 900 SOA ns-1432.awsdns-51.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0