dns2.net-uno.net has no NS records.
NS records for this zone are defined at net-uno.net.
NS records for this zone are defined at net-uno.net.
Question and response
Question
dig dns2.net-uno.net. NS
Answer
The response has no answer records.
Authority
net-uno.net. 43200 SOA n1.net-uno.net. root.net-uno.net. 2026020402 14400 3600 1209600 86400
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0