www.datacenter.eu has no CNAME records.
Question and response
Question
dig www.datacenter.eu. NS
Answer
The response has no answer records.
Authority
datacenter.eu. 4620 SOA ns1.eurodns.com. hostmaster.eurodns.com. 2025122201 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0