ns2.ms.uncu.edu.ar has no CNAME records.
Question and response
Question
dig ns2.ms.uncu.edu.ar. NS
Answer
The response has no answer records.
Authority
ms.uncu.edu.ar. 4036 SOA ns1.ms.uncu.edu.ar. tic.uncu.edu.ar. 2025060201 28800 7200 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0