s3.csa2.acemsa4.com has no NS records.
NS records for this zone are defined at acemsa4.com.
NS records for this zone are defined at acemsa4.com.
Question and response
Question
dig s3.csa2.acemsa4.com. NS
Answer
The response has no answer records.
Authority
acemsa4.com. 900 SOA ns-676.awsdns-20.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0