cursadas.fce.uncu.edu.ar has no CNAME records.
Question and response
Question
dig cursadas.fce.uncu.edu.ar. NS
Answer
The response has no answer records.
Authority
fce.uncu.edu.ar. 7819 SOA fce.uncu.edu.ar. informatica.fce.uncu.edu.ar. 2026021101 7200 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0