Apex domains cannot have CNAME records.
Question and response
Question
dig atom86.net. NS
Answer
atom86.net. 2 NS fred.ns.cloudflare.com.
atom86.net. 2 NS laila.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0