Apex domains cannot have CNAME records.
Question and response
Question
dig skybb.net.nz. NS
Answer
skybb.net.nz. 1 NS ns-543.awsdns-03.net.
skybb.net.nz. 1 NS ns-1084.awsdns-07.org.
skybb.net.nz. 1 NS ns-1694.awsdns-19.co.uk.
skybb.net.nz. 1 NS ns-114.awsdns-14.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0