server2.hostcoloreurope.com has no CNAME records.
Question and response
Question
dig server2.hostcoloreurope.com. NS
Answer
The response has no answer records.
Authority
hostcoloreurope.com. 1705 SOA ben.ns.cloudflare.com. dns.cloudflare.com. 2392796544 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0