rp.ps33010.ciberserver.com has no CNAME records.
Question and response
Question
dig rp.ps33010.ciberserver.com. NS
Answer
The response has no answer records.
Authority
ps33010.ciberserver.com. 9047 SOA ns1.ciberserver.com. status.ciberconceito.com. 2021111800 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0