Apex domains cannot have CNAME records.
Question and response
Question
dig cloud86-host.io. NS
Answer
cloud86-host.io. 4 NS ns2.cloud86.nl.
cloud86-host.io. 4 NS ns1.cloud86.nl.
cloud86-host.io. 4 NS ns3.cloud86.eu.
Authority
The response has no authority records.
Additional
ns1.cloud86.nl. 4 A 45.82.188.13
ns2.cloud86.nl. 4 A 81.171.31.1
ns1.cloud86.nl. 4 AAAA 2a0e:7280:0:188:13:1337:53:1
ns2.cloud86.nl. 4 AAAA 2001:1af8:4700:a05c:11:1337:53:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0