gerd.zarea.net has no CNAME records.
Question and response
Question
dig gerd.zarea.net. NS
Answer
The response has no answer records.
Authority
zarea.net. 3307 SOA ns1.regzone.cz. administrator.czechia.cz. 2026022602 10800 1800 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0