ns2.acw.at has no CNAME records.
Question and response
Question
dig ns2.acw.at. NS
Answer
The response has no answer records.
Authority
acw.at. 798 SOA ns.acw.at. hostmaster.acw.at. 2020031713 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0