Apex domains cannot have CNAME records.
Question and response
Question
dig proxinet.co.id. NS
Answer
proxinet.co.id. 5 NS athena.mcs.co.id.
proxinet.co.id. 5 NS sirius.mcs.co.id.
proxinet.co.id. 5 NS capricorn.mcs.co.id.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0