mail.sdq.edu.do has no NS records.
NS records for this zone are defined at sdq.edu.do.
NS records for this zone are defined at sdq.edu.do.
Question and response
Question
dig mail.sdq.edu.do. NS
Answer
The response has no answer records.
Authority
sdq.edu.do. 300 SOA ns1.bluehost.com. root.box2440.bluehost.com. 2021032000 86400 7200 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0