manus.authdns.RIPE.NET has no CNAME records.
Question and response
Question
dig manus.authdns.RIPE.NET. NS
Answer
The response has no answer records.
Authority
ripe.net. 3300 SOA manus.authdns.ripe.net. dns.ripe.net. 1771631722 3600 600 864000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0