OP here. Some more information here (not my preferred source, but oh well): https://www.news.com.au/technology/online/hacking/up-to-9-million-aussies-affected-

OP here. Some more information here (not my preferred source, but oh well): https://www.news.com.au/technology/online/hacking/up-to-9-million-aussies-affected-in-major-optus-data-breach/news-story/c3e98ef6123f4871739cc1525fddd6ef https://www.news.com.au/technology/online/hacking/up-to-9-mi... It seems around 2.8m have had 'all' data stolen (including ID, address, etc), and around 7m 'just' names, DoB and numbers/e-mail addresses. Apparently Optus is working on sending personalised details to customers. What a monumental stuff up.