the internet code for Australia is - ".au".
Information about .au domains
There are estimated to be about 2,486,320 domains with .au suffix (2014).
The Intended use for .au domains is for entities connected with Australia.
Actual use: Very popular in Australia.
The .au internet code was Introduced in 1986.
The Sponsoring Organisation for .au domains is ".au Domain Administration (auDA)".
Structure of .au ccTLD: Names may be registered only at the third level within generic second-level categories.
Registration restrictions of .au domain: Limited to individuals, companies, and organisations located in Australia; different subdomains have various other restrictions.
.au Domain Administration (auDA)'s contact details - See link
For .au domain registration click on the following link - See link
For a whois search on .au domains click on the following link - See link
You can see more details about the .au ccTLD in Wikipedia - See link
Internet website in Australia with .au code (2014)
.au code is used by 0.90% of all world's websites.
Most popular websites with .au domain
Internet ipaddress and mailsevers
IP Addresses: 48,941,115.
Number of Internet Users (2014)
Australia makes up 0.73% of the world's Internet users and it ranked on 26 place compared to other countries in the world.
According to data from internetlivestats.com there are 21,176,595 internet users in Australia, which makes up about 89.62% of Australia's population (23,630,169).
Search for .au domains on google Australia - See link
SOURCES OF INFORMATION
Domain Count Statistics for TLDs - See link