Apex domains cannot have CNAME records.
Question and response
Question
dig quaventriox.com. NS
Answer
quaventriox.com. 4 NS ns-1607.awsdns-08.co.uk.
quaventriox.com. 4 NS ns-1714.awsdns-22.co.uk.
quaventriox.com. 4 NS ns-1465.awsdns-55.org.
quaventriox.com. 4 NS ns-1529.awsdns-63.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0