Apex domains cannot have CNAME records.
Question and response
Question
dig 3gmotion.cl. NS
Answer
3gmotion.cl. 5 NS ns-1693.awsdns-19.co.uk.
3gmotion.cl. 5 NS ns-281.awsdns-35.com.
3gmotion.cl. 5 NS ns-860.awsdns-43.net.
3gmotion.cl. 5 NS ns-1107.awsdns-10.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0