Apex domains cannot have CNAME records.
Question and response
Question
dig my. NS
Answer
my. 5 NS ns01.trs-dns.com.
my. 5 NS ns01.trs-dns.net.
my. 5 NS a.mynic.centralnic-dns.com.
my. 5 NS b.mynic.centralnic-dns.com.
my. 5 NS c.mynic.centralnic-dns.com.
my. 5 NS d.mynic.centralnic-dns.com.
my. 5 NS a.nic.my.
Authority
The response has no authority records.
Additional
a.nic.my. 172767 A 103.44.108.53
a.nic.my. 172767 AAAA 2001:ddc:0:53:0:0:0:53
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0