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