ABN Lookup is the public view of the Australian Business Register (ABR). It provides access to publicly available information supplied by
businesses when they register for an Australian Business Number (ABN).
Your ABN may be cancelled if evidence shows you are no longer carrying on an enterprise. For example, in the last two years you have not:
If you did not receive a letter saying your ABN has been cancelled, it could mean your contact details were not up-to-date.