Apex domains cannot have CNAME records.
Question and response
Question
dig webstarthost.net.au. NS
Answer
webstarthost.net.au. 5 NS dns1.webstarthost.net.au.
webstarthost.net.au. 5 NS dns2.webstarthost.net.au.
Authority
The response has no authority records.
Additional
dns1.webstarthost.net.au. 5 A 223.27.29.165
dns2.webstarthost.net.au. 5 A 223.27.29.183
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0