mail.usn.edu.do has no NS records.
NS records for this zone are defined at usn.edu.do.
NS records for this zone are defined at usn.edu.do.
Question and response
Question
dig mail.usn.edu.do. NS
Answer
The response has no answer records.
Authority
usn.edu.do. 86400 SOA ns1411.websitewelcome.com. gerencia.teldiux.com. 2026020101 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0