Apex domains cannot have CNAME records.
Question and response
Question
dig moares.ar. NS
Answer
moares.ar. 5 NS ns.gimenez.ar.
moares.ar. 5 NS d4460d59bffd.sn.mynetname.net.
Authority
The response has no authority records.
Additional
ns.gimenez.ar. 5 A 45.177.147.118
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0