Apex domains cannot have CNAME records.
Question and response
Question
dig xentrixora.com. NS
Answer
xentrixora.com. 5 NS ns-1620.awsdns-10.co.uk.
xentrixora.com. 5 NS ns-1906.awsdns-46.co.uk.
xentrixora.com. 5 NS ns-184.awsdns-23.com.
xentrixora.com. 5 NS ns-1070.awsdns-05.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0