THIS is one of the domains used by Platypus Hosting to host subdomain names.
It's an easy way to get a website started without spending much total
$26 per year. (But you can upgrade hosting facilities at any time with us).
Click Subdomain hosting for more details.
Say you want a .COM.AU name but it's not available.
Briefly, you choose a subdomain name* say "plumbers".
Next choose one of our short domains, say "www.75.com.au."
Then we provide cheap web hosting for: www.plumbers.75.com.au.
Then you have a .COM.AU web address without the domain name registration cost.