Apex domains cannot have CNAME records.
Question and response
Question
dig jogja.citra.net.id. NS
Answer
jogja.citra.net.id. 1 NS bantul.citra.net.id.
jogja.citra.net.id. 1 NS badran.as23951.com.
jogja.citra.net.id. 1 NS tugu.as23951.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0