Apex domains cannot have CNAME records.
Question and response
Question
dig mysecurecloudhost.com. NS
Answer
mysecurecloudhost.com. 1 NS kirk.ns.cloudflare.com.
mysecurecloudhost.com. 1 NS zara.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0