Apex domains cannot have CNAME records.
Question and response
Question
dig tlink.cl. NS
Answer
tlink.cl. 5 NS ns53.cloudns.net.
tlink.cl. 5 NS ns52.cloudns.net.
tlink.cl. 5 NS ns51.cloudns.net.
tlink.cl. 5 NS ns54.cloudns.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0