Apex domains cannot have CNAME records.
Question and response
Question
dig etherned.nl. NS
Answer
etherned.nl. 4 NS ns2.argewebhosting.com.
etherned.nl. 4 NS ns3.argewebhosting.nl.
etherned.nl. 4 NS ns1.argewebhosting.eu.
Authority
The response has no authority records.
Additional
ns1.argewebhosting.eu. 4 A 31.25.98.210
ns2.argewebhosting.com. 4 A 31.25.98.169
ns3.argewebhosting.nl. 4 A 92.63.168.137
ns1.argewebhosting.eu. 4 AAAA 2a05:1500:702:0:1c00:eff:fe00:ce
ns2.argewebhosting.com. 4 AAAA 2a05:1500:702:0:1c00:13ff:fe00:a5
ns3.argewebhosting.nl. 4 AAAA 2a05:1500:600:7:1c00:55ff:fe00:f1a
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0