Apex domains cannot have CNAME records.
Question and response
Question
dig octopoly.nz. NS
Answer
octopoly.nz. 5 NS ns1.moreweb.nz.
octopoly.nz. 5 NS ns3.moreweb.nz.
octopoly.nz. 5 NS ns2.moreweb.nz.
octopoly.nz. 5 NS ns4.moreweb.nz.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0