mail.lvcs.edu.do has no NS records.
NS records for this zone are defined at lvcs.edu.do.
NS records for this zone are defined at lvcs.edu.do.
Question and response
Question
dig mail.lvcs.edu.do. NS
Answer
The response has no answer records.
Authority
lvcs.edu.do. 3600 SOA ns1.contabo.net. hostmaster.contabo.de. 1772430470 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0