Apex domains cannot have CNAME records.
Question and response
Question
dig hostingxs.nl. NS
Answer
hostingxs.nl. 3 NS nsauth2.ixlhosting.nl.
hostingxs.nl. 3 NS nsauth1.ixlhosting.nl.
Authority
The response has no authority records.
Additional
nsauth1.ixlhosting.nl. 3 A 5.61.248.164
nsauth2.ixlhosting.nl. 3 A 93.119.13.218
nsauth1.ixlhosting.nl. 3 AAAA 2a01:7860:0:0:db:1152:a:1
nsauth2.ixlhosting.nl. 3 AAAA 2a01:7c8:bb09:15e:5054:ff:fed2:6901
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0