mail5112.mkt5710.com has no NS records.
NS records for this zone are defined at mkt5710.com.
NS records for this zone are defined at mkt5710.com.
Question and response
Question
dig mail5112.mkt5710.com. NS
Answer
The response has no answer records.
Authority
mkt5710.com. 900 SOA ns1.acoustic-adm.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0