ns2.optic.gob.do has no NS records.
NS records for this zone are defined at optic.gob.do.
NS records for this zone are defined at optic.gob.do.
Question and response
Question
dig ns2.optic.gob.do. NS
Answer
The response has no answer records.
Authority
optic.gob.do. 1800 SOA kiki.ns.cloudflare.com. dns.cloudflare.com. 2397558546 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0