mx2.wu-wien.ac.at has no NS records.
NS records for this zone are defined at wu-wien.ac.at.
NS records for this zone are defined at wu-wien.ac.at.
Question and response
Question
dig mx2.wu-wien.ac.at. NS
Answer
The response has no answer records.
Authority
wu-wien.ac.at. 300 SOA ns0n.wu-wien.ac.at. postmaster.wu-wien.ac.at. 2026031101 1800 900 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0