State and Postcode
What the state and postcode fields mean on an ABN record, why they may not match the business trading location, and how to read them correctly.
- Definition
State and Postcode
Two fields on ABN records that show the state or territory and postcode associated with the entity's registration, derived from the business address provided to the ATO.
Why it matters
Most ABN records include a state and postcode. These fields give a general geographic indicator for the entity — but they are not a street address and should not be treated as one.
If you are trying to understand where an entity is registered, state and postcode provide a starting point. They show which state or territory and postcode area the entity is associated with based on the address recorded in the ABR dataset.
These fields are useful as broad geographic context. They help distinguish entities with similar names operating in different locations.
What these fields show
- State — the Australian state or territory code associated with the entity's registered address. Common values include NSW, VIC, QLD, SA, WA, TAS, ACT, and NT.
- Postcode — the four-digit postal code linked to the registered address.
Together, they give a rough geographic indicator. They do not provide a full address, suburb name, or street-level location.
Why the location may not match
The state and postcode on an ABN record come from the business address the entity provided to the ATO at the time of registration or during a later update. This means:
- The registered address may be a PO box, an accountant's office, or a home address — not a trading location.
- A business that operates in multiple states may show only one state on its ABN record.
- The recorded postcode may reflect where the entity was registered years ago and may not match where it operates today.
- Some entities update their address regularly. Others do not.
What this means
State and postcode show the registered location associated with the entity in the ABR dataset. They provide useful geographic context — for instance, distinguishing two similarly named entities in different states. When the state or postcode changes between weekly snapshots, that change is detected and recorded.
What state and postcode tell you
State and postcode provide a geographic indicator based on the address the entity registered with the ATO. Use them to distinguish similarly named entities in different locations and to get a general sense of where the entity is based.
For verified address details, contact the entity directly or check state-level business registers.
This page is part of an independent reference product. The site compares weekly data snapshots to surface changes and explanations. Read our methodology.