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