Apex domains cannot have CNAME records.
Question and response
Question
dig ilger.com. NS
Answer
ilger.com. 2 NS ns1.register.it.
ilger.com. 2 NS ns2.register.it.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0