Apex domains cannot have CNAME records.
Question and response
Question
dig hos3n.hnc.cl. NS
Answer
hos3n.hnc.cl. 5 NS dns2.hnc.cl.
hos3n.hnc.cl. 5 NS dns1.hnc.cl.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0