Apex domains cannot have CNAME records.
Question and response
Question
dig hnc.cl. NS
Answer
hnc.cl. 5 NS cl.hnc.cl.
hnc.cl. 5 NS cl2.hnc.cl.
hnc.cl. 5 NS cl4.hnc.cl.
Authority
The response has no authority records.
Additional
cl.hnc.cl. 5 A 54.39.39.76
cl2.hnc.cl. 5 A 187.49.9.18
cl2.hnc.cl. 5 A 198.50.219.169
cl4.hnc.cl. 5 A 198.50.219.169
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0