Apex domains cannot have CNAME records.
Question and response
Question
dig aeesml.com. NS
Answer
aeesml.com. 2 NS ns-2015.awsdns-59.co.uk.
aeesml.com. 2 NS ns-550.awsdns-04.net.
aeesml.com. 2 NS ns-744.awsdns-29.net.
aeesml.com. 2 NS ns-1417.awsdns-49.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0