Apex domains cannot have CNAME records.
Question and response
Question
dig tribecrm.nl. NS
Answer
tribecrm.nl. 5 NS ns3.divinet.nl.
tribecrm.nl. 5 NS ns4.divinet.nl.
tribecrm.nl. 5 NS ns0.divinet.nl.
Authority
The response has no authority records.
Additional
ns0.divinet.nl. 5 A 81.93.62.242
ns3.divinet.nl. 5 A 95.128.2.105
ns4.divinet.nl. 5 A 95.128.6.161
ns0.divinet.nl. 5 AAAA 2001:16e8:1115:10:81:93:62:242
ns3.divinet.nl. 5 AAAA 2a01:a640:301:525:95:128:2:105
ns4.divinet.nl. 5 AAAA 2a01:a640:301:526:95:128:6:161
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0