dns4.interbusiness.it has no CNAME records.
Question and response
Question
dig dns4.interbusiness.it. NS
Answer
The response has no answer records.
Authority
interbusiness.it. 9420 SOA dns10-ha.interbusiness.it. staffdns.telecomitalia.it. 2019054185 86400 7200 2592000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0