ns4.root24.eu has no CNAME records.
Question and response
Question
dig ns4.root24.eu. NS
Answer
The response has no answer records.
Authority
root24.eu. 1634 SOA ns1.root24.eu. jh2000.root24.eu. 1603877229 3600 1800 1500000 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0