Apex domains cannot have CNAME records.
Question and response
Question
dig firoptix.co.id. NS
Answer
firoptix.co.id. 4 NS dns2.firoptix.co.id.
firoptix.co.id. 4 NS dns1.firoptix.co.id.
Authority
The response has no authority records.
Additional
dns1.firoptix.co.id. 4 A 103.236.188.37
dns2.firoptix.co.id. 4 A 103.236.188.38
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0