mail1202.transact.namginc.com has no NS records.
NS records for this zone are defined at namginc.com.
NS records for this zone are defined at namginc.com.
Question and response
Question
dig mail1202.transact.namginc.com. NS
Answer
The response has no answer records.
Authority
namginc.com. 900 SOA ns-707.awsdns-24.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0