Apex domains cannot have CNAME records.
Question and response
Question
dig devonianmists.com. NS
Answer
devonianmists.com. 5 NS ns-1240.awsdns-27.org.
devonianmists.com. 5 NS ns-1986.awsdns-56.co.uk.
devonianmists.com. 5 NS ns-94.awsdns-11.com.
devonianmists.com. 5 NS ns-123.awsdns-15.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0