ABN Lookup is the free 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).
The ABN Lookup tools may assist with multiple searches.
Display of historical trading name
The ABR stopped collecting or updating trading names in May 2012. Trading names that were collected prior to 28 May 2012 will continue to be displayed on ABN Lookup but are only provided for historical reference. Businesses not operating under their own names must register their business name on the national Business Names Register.
For more information see our help section.
Update your ABN details
It is essential your ABN details are kept up-to-date. Many agencies across all levels of government rely on ABN information to target and provide important community services.
Tell us within 28 days if your business operation ceases or if your details change. Your ABN may be cancelled if information shows you are no longer carrying on a business.
To update your ABN details go to abr.gov.au 
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Did you know?
ABN Lookup served over 1.1 billion searches in the last ten months and 83% of those searches used the ABN Lookup web services.
ABN Lookup web services allows you to integrate ABN Lookup validation and data into your own applications. Access to the service is free and easy to use.
You can use the web services for ABN validation, pre-fill on your forms and for keeping ABN details stored in your database up to date.