_dmarc.patt.net has no CNAME records.
Question and response
Question
dig _dmarc.patt.net. NS
Answer
The response has no answer records.
Authority
patt.net. 10734 SOA ns.owe.de. hostmaster.owe.de. 2024112805 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0