mail.mip.gob.do has no NS records.
NS records for this zone are defined at mip.gob.do.
NS records for this zone are defined at mip.gob.do.
Question and response
Question
dig mail.mip.gob.do. NS
Answer
The response has no answer records.
Authority
mip.gob.do. 1800 SOA kiki.ns.cloudflare.com. dns.cloudflare.com. 2397102825 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0