Where must real ACNs be displayed?

Real businesses are legally required to show their ACN (or ABN, if it contains the ACN) on significant public documents such as invoices, contracts, ASIC lodgments, receipts, order forms, loan documents, and letters

What documents do not need an ACN?

Machine-printed receipts, business cards, packaging, labels, advertisements with no specific offers, television commercials, and vehicle signs do not normally need ACNs

Can I export generated ACNs?

Of course. You can copy individual ACNs after creation or export up to 100 as CSV for easy insertion into your test or staging environments.

How do I validate a real ACN?

Utilize ASIC's ACN search via ASIC Connect or check documents to confirm an ACN is active and corresponds to a registered company.

Are synthetic ACNs secure?

Yes. Since they're not real and unassigned, there is no risk of conflict with real company data. The numbers are temporary and for testing only.

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Generate ACN

The Australian Company Number (ACN) is a unique 9-digit identifier assigned to every company registered in Australia. It's used to identify companies in official documents and business communications.

About ACN

Australian Company Number for company identification and registration

Features

Generate valid ACN numbers that pass official validation
Bulk generation for testing multiple scenarios
CSV export for easy integration with test suites
Real-time validation with detailed error messages
Support for multiple formats and variations

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How to Use

Enter the number of ACNs you need
Configure any additional options (state, country, etc.)
Click the generate button
Copy results or download as CSV

Example Format

412573374

All generated ACNs follow official formatting standards.

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Frequently Asked Questions

Common questions about ACN generation.

What is an ACN?

An Australian Company Number (ACN) is a 9-digit number issued by ASIC when a company is registered under the Corporations Act 2001. It is a permanent legal identifier for your company.

How is an ACN different from an ABN?

An ABN (11 digits) is issued by the ATO for all businesses, including sole traders and trusts. An ACN (9 digits) is only for companies and is issued by ASIC. Often, the ABN incorporates the ACN with two extra check digits

Why use a test ACN?

Our generator provides valid-format, checksum-correct 9-digit ACNs for testing and development only. They’re not registered—ideal for demos, dev environments, or populating mock databases.

Can I generate more than one ACN at a time?

Yes! You can generate 1 to 100 ACNs at the click of a button—perfect for bulk end user testing or automated systems.

Are ACNs generated real or registered?

No—they are fictional but conform to valid format and checksum rules. They should never be used for actual company registration or legal documentation in the real world.