Question With Regards to Sites...

While browsing the web yesterday I attempted to follow a few links, namely

www.dimia.gov.au
nonomy.com.uk

The pages pages showed up as the following Starhub intercept pages, respectively:

link
and
link

I was wondering exactly why this happened. Posting this topic in this section because I suspect that it has something to do with my connection, since my internet provider is Starhub. Also, what displays for you when you try to access the dimia and nonomy sites?

I just get the "Server not found" message.