Apex domains cannot have CNAME records.
Question and response
Question
dig zorventix.com. NS
Answer
zorventix.com. 4 NS ns-1751.awsdns-26.co.uk.
zorventix.com. 4 NS ns-918.awsdns-50.net.
zorventix.com. 4 NS ns-131.awsdns-16.com.
zorventix.com. 4 NS ns-1257.awsdns-29.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0