Apex domains cannot have CNAME records.
Question and response
Question
dig excellent.co.id. NS
Answer
excellent.co.id. 5 NS ns-1291.awsdns-33.org.
excellent.co.id. 5 NS ns-533.awsdns-02.net.
excellent.co.id. 5 NS ns-40.awsdns-05.com.
excellent.co.id. 5 NS ns-1819.awsdns-35.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0