Apex domains cannot have CNAME records.
Question and response
Question
dig acconciatori.biz. NS
Answer
acconciatori.biz. 5 NS ns1.acconciatori.biz.
acconciatori.biz. 5 NS ns2.acconciatori.biz.
Authority
The response has no authority records.
Additional
ns1.acconciatori.biz. 5 A 51.210.9.225
ns2.acconciatori.biz. 5 A 51.68.57.177
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0