Apex domains cannot have CNAME records.
Question and response
Question
dig entranceasia.com. NS
Answer
entranceasia.com. 5 NS ns-321.awsdns-40.com.
entranceasia.com. 5 NS ns-1166.awsdns-17.org.
entranceasia.com. 5 NS ns-660.awsdns-18.net.
entranceasia.com. 5 NS ns-1743.awsdns-25.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0