Apex domains cannot have CNAME records.
Question and response
Question
dig walanja.com. NS
Answer
walanja.com. 5 NS ns2.cifo.co.id.
walanja.com. 5 NS ns1.cifo.co.id.
Authority
The response has no authority records.
Additional
ns1.cifo.co.id. 5 A 103.14.20.20
ns2.cifo.co.id. 5 A 103.14.21.21
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0