ns2.evsis.com.ar has no CNAME records.
Question and response
Question
dig ns2.evsis.com.ar. NS
Answer
The response has no answer records.
Authority
evsis.com.ar. 2397 SOA ns1.evsis.com.ar. hostmaster.evsis.com.ar. 2023051968 21600 10800 604800 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0