mail.delta.co.at has no NS records.
NS records for this zone are defined at delta.co.at.
NS records for this zone are defined at delta.co.at.
Question and response
Question
dig mail.delta.co.at. NS
Answer
The response has no answer records.
Authority
delta.co.at. 3600 SOA ns1.delta.co.at. root.delta.co.at. 2024071701 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0