Apex domains cannot have CNAME records.
Question and response
Question
dig terabit.net.id. NS
Answer
terabit.net.id. 5 NS ns4.terabit.net.id.
terabit.net.id. 5 NS ns2.terabit.net.id.
terabit.net.id. 5 NS ns3.terabit.net.id.
terabit.net.id. 5 NS ns0.terabit.net.id.
terabit.net.id. 5 NS ns1.terabit.net.id.
Authority
The response has no authority records.
Additional
ns0.terabit.net.id. 5 A 121.101.134.134
ns1.terabit.net.id. 5 A 121.101.135.134
ns2.terabit.net.id. 5 A 121.101.130.122
ns3.terabit.net.id. 5 A 103.247.13.13
ns4.terabit.net.id. 5 A 121.101.135.50
ns0.terabit.net.id. 5 AAAA 2402:e300:e300:0:0:0:0:4136
ns1.terabit.net.id. 5 AAAA 2402:e300:e300:0:0:0:0:135
ns2.terabit.net.id. 5 AAAA 2402:e300:e300:0:0:0:0:122
ns3.terabit.net.id. 5 AAAA 2402:e300:e300:0:0:0:0:1313
ns4.terabit.net.id. 5 AAAA 2402:e300:e300:0:0:0:0:52
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0