ABN Lookup — find any Australian business

Search 20,646,429 Australian Business Numbers by ABN or business name. See if an ABN is active, whether the business is registered for GST, its entity type, ACN, trading names and location — free, no sign-up.

20,646,429ABNs
8,955,771active
3,686,024GST registered
4 November 2026last update
ABN checkerValidate an 11-digit ABN with the official check-digit formula.GST checkFind out if a supplier can charge you GST.Search by nameFind the ABN of a business from its name.
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What is an ABN?

The Australian Business Number is a unique 11-digit number issued by the Australian Business Register to businesses and organisations. You need it to invoice other businesses, register for GST and deal with the ATO.

Why check an ABN?

Before you pay an invoice, confirm the ABN is active and belongs to the business that sent it. If a supplier charges GST, check they are actually registered for GST. If no ABN is quoted, you may need to withhold tax.

How to use Find My ABN

Type the 11-digit ABN (spaces are fine) or the start of the business name, then open the result to see status, GST, entity type and names.

Browse businesses by state

New South Wales2,929,295 active ABNsVictoria2,466,588 active ABNsQueensland1,753,844 active ABNsWestern Australia889,603 active ABNsSouth Australia570,223 active ABNsTasmania135,364 active ABNsAustralian Capital Territory127,874 active ABNsNorthern Territory55,797 active ABNs

Browse by entity type

Individual/Sole Trader4,196,830 active ABNsAustralian Private Company2,169,964 active ABNsATO Regulated Self-Managed Superannuation Fund708,713 active ABNsDiscretionary Investment Trust425,814 active ABNsDiscretionary Trading Trust375,530 active ABNsFamily Partnership230,337 active ABNsOther Incorporated Entity173,795 active ABNsStrata-title168,568 active ABNsFixed Unit Trust160,791 active ABNs

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