mx1.lix.aon.at has no NS records.
NS records for this zone are defined at lix.aon.at.
NS records for this zone are defined at lix.aon.at.
Question and response
Question
dig mx1.lix.aon.at. NS
Answer
The response has no answer records.
Authority
lix.aon.at. 3600 SOA dns2.telekom.at. domainadmin.a1.net. 2025040101 10800 3600 1814400 3600
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0