mail.setid.edu.do has no NS records.
NS records for this zone are defined at setid.edu.do.
NS records for this zone are defined at setid.edu.do.
Question and response
Question
dig mail.setid.edu.do. NS
Answer
The response has no answer records.
Authority
setid.edu.do. 1800 SOA ben.ns.cloudflare.com. dns.cloudflare.com. 2394757073 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0