ip57.ip-51-75-8.eu has no CNAME records.
Question and response
Question
dig ip57.ip-51-75-8.eu. NS
Answer
The response has no answer records.
Authority
ip-51-75-8.eu. 62 SOA dns10.ovh.net. tech.ovh.net. 2020120200 86400 3600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0