mail6236.affinitylabs.mkt1616.com has no NS records.
NS records for this zone are defined at mkt1616.com.
NS records for this zone are defined at mkt1616.com.
Question and response
Question
dig mail6236.affinitylabs.mkt1616.com. NS
Answer
The response has no answer records.
Authority
mkt1616.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