Apex domains cannot have CNAME records.
Question and response
Question
dig nspanel1.leonet.it. NS
Answer
nspanel1.leonet.it. 5 NS dns2.leonet.it.
nspanel1.leonet.it. 5 NS dns.leonet.it.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0