Apex domains cannot have CNAME records.
Question and response
Question
dig indosatooredoo.com. NS
Answer
indosatooredoo.com. 5 NS ns4.indosatooredoo.com.
indosatooredoo.com. 5 NS nakula.indosatooredoo.com.
indosatooredoo.com. 5 NS sadewa.indosatooredoo.com.
indosatooredoo.com. 5 NS external.auth-dns001-udc1.
indosatooredoo.com. 5 NS external.auth-dns002-udc2.
indosatooredoo.com. 5 NS ns2.indosatooredoo.com.
Authority
The response has no authority records.
Additional
ns2.indosatooredoo.com. 5 A 202.152.165.36
ns4.indosatooredoo.com. 5 A 202.93.40.174
nakula.indosatooredoo.com. 5 A 202.152.161.227
sadewa.indosatooredoo.com. 5 A 202.152.161.229
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0