31.32.ciberserver.com has no CNAME records.
Question and response
Question
dig 31.32.ciberserver.com. NS
Answer
The response has no answer records.
Authority
32.ciberserver.com. 334 SOA ns1.ciberserver.com. status.ciberconceito.com. 2022072800 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0