Apex domains cannot have CNAME records.
Question and response
Question
dig visitcloud.com. NS
Answer
visitcloud.com. 5 NS ns-534.awsdns-02.net.
visitcloud.com. 5 NS ns-154.awsdns-19.com.
visitcloud.com. 5 NS ns-1755.awsdns-27.co.uk.
visitcloud.com. 5 NS ns-1114.awsdns-11.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0