ns2.amc.com.ar has no CNAME records.
Question and response
Question
dig ns2.amc.com.ar. NS
Answer
The response has no answer records.
Authority
amc.com.ar. 3285 SOA ns2.amc.com.ar. hosting.amc.com.ar. 2024022801 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0