Apex domains cannot have CNAME records.
Question and response
Question
dig v-vannoy.com. NS
Answer
v-vannoy.com. 5 NS ns-997.awsdns-60.net.
v-vannoy.com. 5 NS ns-170.awsdns-21.com.
v-vannoy.com. 5 NS ns-95.awsdns-11.com.
v-vannoy.com. 5 NS ns-1821.awsdns-35.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0