Apex domains cannot have CNAME records.
Question and response
Question
dig chefmarkwilson.com. NS
Answer
chefmarkwilson.com. 1 NS ns-867.awsdns-44.net.
chefmarkwilson.com. 1 NS ns-1370.awsdns-43.org.
chefmarkwilson.com. 1 NS ns-54.awsdns-06.com.
chefmarkwilson.com. 1 NS ns-254.awsdns-31.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0