Apex domains cannot have CNAME records.
Question and response
Question
dig nederhost.net. NS
Answer
nederhost.net. 4 NS ns2.nederhost.eu.
nederhost.net. 4 NS ns1.nederhost.nl.
nederhost.net. 4 NS ns3.nederhost.net.
Authority
The response has no authority records.
Additional
ns1.nederhost.nl. 5 A 141.105.123.200
ns2.nederhost.eu. 5 A 192.174.68.100
ns3.nederhost.net. 4 A 176.97.158.100
ns1.nederhost.nl. 5 AAAA 2a02:2308:60:2f1:0:0:1:1
ns2.nederhost.eu. 5 AAAA 2001:67c:1bc:0:0:0:0:100
ns3.nederhost.net. 4 AAAA 2001:67c:10b8:0:0:0:0:100
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0