Apex domains cannot have CNAME records.
Question and response
Question
dig ip-141-95-45.eu. NS
Answer
ip-141-95-45.eu. 4 NS dns107.ovh.net.
ip-141-95-45.eu. 4 NS ns107.ovh.net.
Authority
The response has no authority records.
Additional
ns107.ovh.net. 4 A 5.135.65.209
dns107.ovh.net. 4 A 5.196.41.137
ns107.ovh.net. 4 AAAA 2001:41d0:b00:fb00:0:0:0:2
dns107.ovh.net. 4 AAAA 2001:41d0:d01:100:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0