Apex domains cannot have CNAME records.
Question and response
Question
dig areumu.com. NS
Answer
areumu.com. 5 NS ns-1739.awsdns-25.co.uk.
areumu.com. 5 NS ns-366.awsdns-45.com.
areumu.com. 5 NS ns-1042.awsdns-02.org.
areumu.com. 5 NS ns-1547.awsdns-01.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0