resolver.uli.it has no CNAME records.
Question and response
Question
dig resolver.uli.it. NS
Answer
The response has no answer records.
Authority
uli.it. 3018 SOA ns1.mynet.it. hostmaster.mynet.it. 2026020918 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0