Hi! Hoping someone in Australia can help me as I can't seem to figure this out.

In the US, the first three digits of a phone number will tell you what state it is from. Do Australian phone numbers work the same way?

I have a number for an office I have to call, but don't know what part of Australia the office is located in, so I don't know when I should call. I don't want to call in the middle of the night and make a bad impression.

Thanks!