Check ABN
Look up Australian business details
Check ABN is an app for ChatGPT. Ask about an Australian business and get its details from the Australian Business Register (ABR) as a clear card.
- Check an ABN or ACN: legal name, ABN status and since when, GST registration and since when, business names, entity type, state and postcode.
- Search by business name: a short pick list of up to 8 active matches, optionally for one state.
- Check a supplier invoice: the ABN, invoice date and GST charged checked against the register, with a pass, warning or fail and a one-line reason.
Where the data comes from
Details come from the ABR's public bulk data: a weekly copy of the ABR, refreshed every Thursday. The current copy is the weekly ABR copy, 4 Nov 2026. Every card shows the date of the copy it used, so changes made at the ABR after that date won't appear yet. Live lookups from the ABR web services will be added later.
Limits
- Read-only, one lookup at a time. No bulk lists or exports.
- Name search matches the start of active business names only.
- The weekly ABR copy has no history, so for an invoice dated before a business's current ABN or GST start date, Check ABN says it can't confirm rather than guessing.
- Check ABN doesn't save your searches or results. See Privacy for exactly what is logged.
Check ABN is an independent tool. It is not a government service and is not made or endorsed by the Australian Government, the ABR or OpenAI.
Check ABN is operated by Suama Pty Ltd (ACN 675 918 920) as trustee for the Suama Trust (ABN 26 626 957 599), Melbourne, Victoria ("we").
Details from the Australian Business Register. Check them before you rely on them. Not a government service.