Apex domains cannot have CNAME records.
Question and response
Question
dig itourbali.com. NS
Answer
itourbali.com. 5 NS ns-47.awsdns-05.com.
itourbali.com. 5 NS ns-262.awsdns-32.com.
itourbali.com. 5 NS ns-933.awsdns-52.net.
itourbali.com. 5 NS ns-1040.awsdns-02.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0