dns2.ontec.at has no CNAME records.
Question and response
Question
dig dns2.ontec.at. NS
Answer
The response has no answer records.
Authority
ontec.at. 3600 SOA dns1.ontec.at. admin.ontec.at. 2026022601 86400 7200 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0