Apex domains cannot have CNAME records.
Question and response
Question
dig it.net. NS
Answer
it.net. 1 NS dns2.it.net.
it.net. 1 NS dns.it.net.
it.net. 1 NS ns102.reevodns.eu.
it.net. 1 NS ns101.reevodns.it.
Authority
The response has no authority records.
Additional
dns.it.net. 1 A 46.37.17.33
dns2.it.net. 1 A 51.195.116.189
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0