_dmarc.fad.uncu.edu.ar has no NS records.
NS records for this zone are defined at uncu.edu.ar.
NS records for this zone are defined at uncu.edu.ar.
Question and response
Question
dig _dmarc.fad.uncu.edu.ar. NS
Answer
The response has no answer records.
Authority
fad.uncu.edu.ar. 177 SOA ns1.fad.uncu.edu.ar. root.fad.uncu.edu.ar. 202312199 300 86400 2419200 604800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0