Apex domains cannot have CNAME records.
Question and response
Question
dig stofa.net. NS
Answer
stofa.net. 5 NS ns0002.secondary.cloudflare.com.
stofa.net. 5 NS ns0211.secondary.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0