Apex domains cannot have CNAME records.
Question and response
Question
dig adam-elsheimer.com. NS
Answer
adam-elsheimer.com. 5 NS ns-941.awsdns-53.net.
adam-elsheimer.com. 5 NS ns-315.awsdns-39.com.
adam-elsheimer.com. 5 NS ns-697.awsdns-23.net.
adam-elsheimer.com. 5 NS ns-736.awsdns-28.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0