Apex domains cannot have CNAME records.
Question and response
Question
dig hahn.com.au. NS
Answer
hahn.com.au. 5 NS emily.ns.cloudflare.com.
hahn.com.au. 5 NS mike.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0