Why does the result show a state and a postcode but no street?

The register gives the state and the postcode of the registered office, not a street address.

Is the Australian GST number the same as the ABN?

Yes. The GST (VAT) number is the bare ABN, and a company carries it only while its ABN is active and registered for GST.

Why does a valid ACN return nothing?

Only proprietary, public and foreign companies are served. An association, a cooperative, another registered body, an individual or a sole trader returns nothing even though it exists. Try the name search.

Can I do this in code?

Yes: GET /companies/search?company_number=004028077&country=AU with an API key returns the same record as JSON.

ACN lookup

Type an ACN, an ARBN, an ABN or a company name and get the company from ASIC and the Australian Business Register: name, type, status, state and postcode, live. The number and its check digit are verified in your browser first.

What an ACN is

Every Australian company has an ACN of 9 digits shown like 004 028 077 for BHP Group Limited; a foreign company has an ARBN of the same shape. The ninth digit is a check digit that is enforced. An 11-digit number is an ABN, which this lookup also accepts and searches with abn.

What the lookup returns

Company records from the Australian Securities and Investments Commission (ASIC) and the Australian Business Register (ABR): company name, legal form and class, status (including strike-off in progress, external administration and deregistration), the state and postcode of the registered office, the ABN, previous names, the VAT (GST) number and dates; updated weekly. Proprietary, public and foreign companies (ACN and ARBN) only. The register gives the state and the postcode, not a street address. ASIC does not separate liquidation from administration, so external administration shows as insolvent and there is no in_liquidation status. No officers, no registry-compliance signal, no activity code, no share capital and no insolvency notices. Associations, cooperatives, other bodies, individuals and sole traders are never served. Register-change events (name, status, legal form and registered address changes, dated by the weekly read that first shows it, none before the first load in October 2026) and company monitoring are available. The data are licensed CC BY 3.0 AU with no sublicensing: the credit and the licence link travel with every answer.

FAQ

The register gives the state and the postcode, not a street address. A GST-registered company has a VAT (GST) number, which is its ABN. Associations, cooperatives, individuals and sole traders are never served.

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Company lookup API · Company autocomplete API. Contains data from the Australian Securities and Investments Commission (ASIC) Company Dataset and the Australian Business Register (ABN Bulk Extract), licensed CC BY 3.0 AU (creativecommons.org/licenses/by/3.0/au/). Adapted by Prometiam (joined, normalised, status derived). CC BY 3.0 AU

Frequently asked questions

Why does the result show a state and a postcode but no street?: The register gives the state and the postcode of the registered office, not a street address.
Is the Australian GST number the same as the ABN?: Yes. The GST (VAT) number is the bare ABN, and a company carries it only while its ABN is active and registered for GST.
Why does a valid ACN return nothing?: Only proprietary, public and foreign companies are served. An association, a cooperative, another registered body, an individual or a sole trader returns nothing even though it exists. Try the name search.
Can I do this in code?: Yes: GET /companies/search?company_number=004028077&country=AU with an API key returns the same record as JSON.