Apex domains cannot have CNAME records.
Question and response
Question
dig backupify.com. NS
Answer
backupify.com. 5 NS ns-695.awsdns-22.net.
backupify.com. 5 NS ns-409.awsdns-51.com.
backupify.com. 5 NS ns-1845.awsdns-38.co.uk.
backupify.com. 5 NS ns-1121.awsdns-12.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0