Apex domains cannot have CNAME records.
Question and response
Question
dig 1eurohost.be. NS
Answer
1eurohost.be. 5 NS ns1.easyhost.be.
1eurohost.be. 5 NS ns3.easyhost.be.
1eurohost.be. 5 NS ns2.easyhost.be.
Authority
The response has no authority records.
Additional
ns1.easyhost.be. 5 A 83.217.73.172
ns2.easyhost.be. 5 A 86.39.202.67
ns3.easyhost.be. 5 A 89.44.166.48
ns1.easyhost.be. 5 AAAA 2a00:1c98:0:0:0:0:53:1
ns2.easyhost.be. 5 AAAA 2001:1598:0:101:0:0:0:3
ns3.easyhost.be. 5 AAAA 2a00:1c98:50:0:0:0:0:50
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0