Apex domains cannot have CNAME records.
Question and response
Question
dig odecu.cl. NS
Answer
odecu.cl. 2 NS ns12.banahosting.com.
odecu.cl. 2 NS ns13.banahosting.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0