mail2001.mkt2434.com has no NS records.
NS records for this zone are defined at mkt2434.com.
NS records for this zone are defined at mkt2434.com.
Question and response
Question
dig mail2001.mkt2434.com. NS
Answer
The response has no answer records.
Authority
mkt2434.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