Apex domains cannot have CNAME records.
Question and response
Question
dig xetusone.com. NS
Answer
xetusone.com. 5 NS ns-1945.awsdns-51.co.uk.
xetusone.com. 5 NS ns-761.awsdns-31.net.
xetusone.com. 5 NS ns-274.awsdns-34.com.
xetusone.com. 5 NS ns-1818.awsdns-35.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0