dns2.net.techdigital.it has no CNAME records.
Question and response
Question
dig dns2.net.techdigital.it. NS
Answer
The response has no answer records.
Authority
net.techdigital.it. 2865 SOA ns1.techdigital.it. root.net.techdigital.it. 2015020310 604800 86400 2419200 604800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0