ns2.z.fi has no CNAME records.
Question and response
Question
dig ns2.z.fi. NS
Answer
The response has no answer records.
Authority
fi. 7044 SOA a.fi. fi-domain-tech.ficora.fi. 2026030567 3605 1800 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0