Apex domains cannot have CNAME records.
Question and response
Question
dig pacificored.cl. NS
Answer
pacificored.cl. 5 NS secundario.nic.cl.
pacificored.cl. 5 NS ns2.mundopacifico.cl.
pacificored.cl. 5 NS ns1.mundopacifico.cl.
Authority
The response has no authority records.
Additional
ns1.mundopacifico.cl. 5 A 190.102.252.138
ns2.mundopacifico.cl. 5 A 190.102.252.154
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0