Apex domains cannot have CNAME records.
Question and response
Question
dig 0-mall.com. NS
Answer
0-mall.com. 5 NS ns-1075.awsdns-06.org.
0-mall.com. 5 NS ns-1936.awsdns-50.co.uk.
0-mall.com. 5 NS ns-942.awsdns-53.net.
0-mall.com. 5 NS ns-1810.awsdns-34.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0