Apex domains cannot have CNAME records.
Question and response
Question
dig vwgroup.it. NS
Answer
vwgroup.it. 5 NS ns.abdns.info.
vwgroup.it. 5 NS ns.abdns.eu.
vwgroup.it. 5 NS ns.abdns.biz.
Authority
The response has no authority records.
Additional
ns.abdns.eu. 5 A 31.14.130.20
ns.abdns.biz. 5 A 95.110.136.38
ns.abdns.info. 5 A 217.61.96.167
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0