Apex domains cannot have CNAME records.
Question and response
Question
dig comm2000.it. NS
Answer
comm2000.it. 5 NS ns2.kpnqwest.it.
comm2000.it. 5 NS ns.kpnqwest.it.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0