Apex domains cannot have CNAME records.
Question and response
Question
dig t3.nz. NS
Answer
t3.nz. 5 NS ns-1203.awsdns-22.org.
t3.nz. 5 NS ns-1827.awsdns-36.co.uk.
t3.nz. 5 NS ns-461.awsdns-57.com.
t3.nz. 5 NS ns-599.awsdns-10.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0