Apex domains cannot have CNAME records.
Question and response
Question
dig intermax.eu. NS
Answer
intermax.eu. 4 NS ns3.intermax.eu.
intermax.eu. 4 NS ns2.intermax.nl.
intermax.eu. 4 NS ns1.intermax.nl.
Authority
The response has no authority records.
Additional
ns1.intermax.nl. 4 A 188.66.20.60
ns2.intermax.nl. 4 A 80.95.172.3
ns3.intermax.eu. 4 A 20.224.227.178
ns1.intermax.nl. 4 AAAA 2001:4c10:0:0:2:667:0:1
ns2.intermax.nl. 4 AAAA 2001:4c10:0:0:2:17:0:3
ns3.intermax.eu. 4 AAAA 2a01:111:f100:9001:0:0:1761:944c
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0