Apex domains cannot have CNAME records.
Question and response
Question
dig chasegallery.com.au. NS
Answer
chasegallery.com.au. 5 NS ns8517.hostgator.com.
chasegallery.com.au. 5 NS ns8518.hostgator.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0