Apex domains cannot have CNAME records.
Question and response
Question
dig febzen.com. NS
Answer
febzen.com. 5 NS piers.ns.cloudflare.com.
febzen.com. 5 NS megan.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0