ASIC, ABN and ABR: Australian business data explained

ABN vs ARBN in three lines

An Australian company usually carries an ABN and an ACN. A foreign company operating in Australia carries an ARBN, and a sole trader or trust carries an ABN and neither of the others. The next section gives each identifier in full.

ABN, ACN and ARBN in one line each

Three identifiers get used interchangeably in conversation about Australian business data, and they are not the same thing.

ABN, Australian Business Number. An 11-digit number issued by the Australian Taxation Office. It identifies any business entity, a sole trader, a partnership, a trust or a company, for tax purposes and for dealings with government. Any entity that trades in Australia is expected to hold one.

ACN, Australian Company Number. A 9-digit number issued by ASIC when a body is registered as a company under the Corporations Act. Only companies get one, and it does not change even if the company later changes its name.

ARBN, Australian Registered Body Number. A 9-digit number issued by ASIC to a body registered with ASIC other than as a company, most commonly a foreign company or another registrable body operating in Australia.

An Australian company therefore typically carries both an ABN and an ACN. A sole trader or a trust carries an ABN and neither of the other two. Knowing which identifier a given data source actually keys on is the first thing to check before joining anything to it, and it is the detail most list-building mistakes trace back to.

In practice, invoices and contracts commonly carry the ABN, because it is the identifier the Australian Taxation Office and most government systems require regardless of legal structure. The ACN tends to surface in a company’s formal legal name and on ASIC-facing paperwork such as annual reviews. For a list builder joining data pulled from several sources, the ABN is usually the safer common key, because it appears across a wider set of entities and datasets than the ACN does.

What the ASIC company dataset actually contains

ASIC publishes its own company dataset through data.gov.au, updated weekly. The download carries Company Name, ACN, Type, Class, Sub Class, Status, Date of Registration, Date of Deregistration (added to the dataset from 11 March 2025), Previous State of Registration where applicable, State Registration Number where applicable, a modified-since-last-report flag, a current name indicator, ABN, current name and current name start date.

That is registration and status data: whether a company exists, what kind it is, whether it is active, deregistered or in some other state, and its name history. It does not carry an address, a phone number, an email, a director’s name, headcount or turnover. ASIC states plainly that the published dataset is a snapshot in time and that ASIC Connect, its own live lookup service, is the real-time source, because legislation prescribes exactly what ASIC is permitted to disclose in the bulk file.

The deregistration date field is a relatively recent addition, appearing in the dataset only from 11 March 2025 onward. Before that date, a company’s exit from the register had to be inferred from a status change alone, with no specific date attached, which is worth knowing when working from an older extract of the same file.

For a list builder, the practical read is that the ASIC dataset answers existence and status well and answers almost nothing about who to contact. It is the correct starting point for filtering out deregistered and strike-off records before anything else is built on top of it.

What the ABN Bulk Extract contains, and what it leaves out

The Australian Business Register, administered by the Australian Taxation Office as a whole-of-government program, publishes the ABN Bulk Extract weekly in XML through abr.business.gov.au. Its fields are ABN, ABN status and date, entity type, legal name, business names, trading names, the state and postcode of the main business location, ACN or ARBN where one exists, GST status and registration date, and deductible gift recipient status and dates.

It is a wider entity net than the ASIC dataset, because it includes sole traders, partnerships and trusts alongside companies, all identified by ABN rather than ACN. What it does not carry is worth stating plainly: no full contact details beyond state and postcode, no company financials, and no headcount. It answers whether an ABN exists and what kind of entity holds it, not who to contact or how large the business actually is.

The same underlying Australian Business Register data also powers the public ABN Lookup tool covered next, so the Bulk Extract and ABN Lookup describe the same register through two different access methods rather than two separate datasets with different content.

ABN Lookup: the record by record alternative

Where the Bulk Extract is a weekly file built for bulk processing, ABN Lookup is the record-by-record service, available both as a public web tool and as web services at abr.business.gov.au. It answers a single question quickly: is this ABN valid, what is its current status, and what entity does it belong to.

The practical use case is verification rather than list building. A list assembled from another source can be checked against ABN Lookup one record at a time, or through its web service inside a script, to confirm the ABN is current before the record goes into an outbound campaign. It will not build a target list on its own, and it was never designed to.

Because ABN Lookup draws on the same underlying register as the Bulk Extract, a mismatch between the two usually means the bulk file is a few days stale rather than the two sources genuinely disagreeing. Refreshing against Lookup before a large send is a cheap way to catch a status change the last bulk pull missed.

Why the two counts of Australian companies differ

Two figures circulate for how many Australian companies exist, and they answer different questions.

The Australian Bureau of Statistics counted 1,271,197 actively trading companies at 30 June 2026, as part of its Counts of Australian Businesses release. That figure comes from ABN, GST and PAYG activity in Australian Taxation Office administrative data, and it only counts entities the ABS can see actually trading.

ASIC’s own published statistics, separately, put the company register at 3,789,244 companies as at August 2026. That number counts every company registered under the Corporations Act, regardless of whether it is currently trading, including dormant, shelf and non-trading entities that never filed for deregistration. That snapshot should not be blended with either of the two figures above, since all three were extracted at different points in time using different scopes.

The gap between the ABS figure and ASIC’s own statistic, roughly two and a half million companies, is almost entirely companies that exist on paper without a current trading footprint. None of them are useful additions to an outbound list, which is exactly why status filtering matters more for targeting purposes than the raw registration count does.

How a list builder joins the two registers

A usable Australian company list draws on both registers, because each one is missing what the other has.

Start from the ASIC company dataset for existence and status: which companies are currently active, filtered out from deregistered, strike-off and external administration records. Each active company carries an ACN and, where present, an ABN. Join that ABN against the ABR’s ABN Bulk Extract to pull entity type, state and postcode, GST status and trading names, none of which the ASIC file itself carries. Where a specific record needs confirming before it goes into a campaign, a spot check through ABN Lookup catches anything that has changed since either bulk file was last pulled.

The join key is the ABN where a record has one. Companies that carry an ACN but no visible ABN in the ASIC extract, which happens with newly registered or dormant entities, need a separate lookup or should be treated as unverified until one is done. Skipping that step is one of the more common ways a purchased or scraped Australian list turns out to carry a large share of dead or unreachable records.

Because the ASIC file and the ABN Bulk Extract are both published weekly but not necessarily on the same day, a freshly deregistered company can briefly appear active in one file and already gone in the other. Rebuilding the join on a fixed weekly schedule, rather than mixing files pulled on different dates, keeps that gap from compounding across a large list.

What none of these sources give you

All three sources, the ASIC dataset, the ABN Bulk Extract and ABN Lookup, answer the same category of question: does this entity exist, what kind is it, and is it currently active. None of them answer the question an outbound campaign actually needs answered.

None carry an email address. None carry a named decision maker, a role, or a direct phone line. None carry headcount or revenue with any reliability, since the ABR extract explicitly excludes financials and headcount and the ASIC dataset was never built to hold them. A company register, however complete, is a list of legal entities. Turning that into a list of people worth contacting is a separate step, built from public web presence, hiring signals and other sources layered on top of the register data, not something either register hands over on its own.

This is not a criticism of the registers. They were built to record who is legally allowed to trade, not to service outbound sales teams, and they do that job accurately. The gap between a legal entity list and a sales-ready contact list is a separate piece of work, and treating the two registers as if they already closed that gap is one of the more common reasons a purchased Australian list under-performs.

Once the list is built, sending it well means scheduling outbound across Australian time zones rather than firing one batch at a European morning. The list also has to be sent under the Spam Act 2003 cold email rules, which set the consent, sender identification and unsubscribe conditions for every Australian address on it.

Two related data pages sit behind this one. 4.77 Million Australian ABN Entities, by Legal Form and Age splits the Bulk Extract by entity type, and New Australian Businesses Registered by State and Year counts new ABNs for every state from 2016 to 2026. To turn a register into a campaign list, follow How to Build a B2B Cold Email List in Australia.

If you would rather have the list built and the outreach run for you, our B2B lead generation agency in Australia works from the same ASIC and ABR data.