dns2.proserver1.at has no NS records.
NS records for this zone are defined at proserver1.at.
NS records for this zone are defined at proserver1.at.
Question and response
Question
dig dns2.proserver1.at. NS
Answer
The response has no answer records.
Authority
proserver1.at. 1 SOA dns1.proserver1.at. hostmaster.proserver1.at. 2026030102 1 1 1 1
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0