Apex domains cannot have CNAME records.
Question and response
Question
dig dyn.launtel.au. NS
Answer
dyn.launtel.au. 5 NS ns02.dyn.launtel.au.
dyn.launtel.au. 5 NS ns01.dyn.launtel.au.
Authority
The response has no authority records.
Additional
ns01.dyn.launtel.au. 5 A 3.106.13.24
ns02.dyn.launtel.au. 5 A 45.77.50.67
ns01.dyn.launtel.au. 5 AAAA 2406:da1c:64c:3000:2de9:2e5d:8e6:ac97
ns02.dyn.launtel.au. 5 AAAA 2001:19f0:5801:147b:5400:5ff:fe34:25ce
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0