Apex domains cannot have CNAME records.
Question and response
Question
dig trexavon.org. NS
Answer
trexavon.org. 5 NS ns-664.awsdns-19.net.
trexavon.org. 5 NS ns-666.awsdns-19.net.
trexavon.org. 5 NS ns-697.awsdns-23.net.
trexavon.org. 5 NS ns-1407.awsdns-47.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0