1800 008 540
1800008540
- Type
- Freecall (1800/180)
- Location
- Not region-specific
- Status
- In use
- Carrier
- Optus Networks Pty Limited
- Assigned since
- 1993
Who has held it
Allocated to Telstra Limited, now held by Optus Networks Pty Limited since 2011. The network above is the current holder, not the company the number started with.
Australian Taxation Office publishes this as one of its own numbers. Call this number to check whether contact claiming to be the ATO is genuine. See where they publish it.
See current scams impersonating ATO.
That does not make an incoming call from this number safe. Caller ID is easy to fake, and impersonating a known number is exactly how these scams work. If someone called you claiming to be Australian Taxation Office, hang up and dial the number yourself, taken from their official website rather than from the call.
How often people look this number up
Looked up 18 times since 18 September 2026, but not once in the last seven days. Calls from it may have stopped.
People look a number up when they do not recognise a call, so this tracks how widely 1800 008 540 is being dialled, not how many people answered.
Did this number call you?
No votes yet. Votes are shown as they are and don't change the verdict. To tell others what happened, write a report.
Community reports
Nothing here yet. If this number called you, you can help the next person by leaving the first report: what they said, and what they wanted.
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Not sure about this call? What to do
- Don't call back or reply to messages from a number you weren't expecting.
- Never share one-time codes, passwords or card details with someone who called you.
- If the caller said they were Australian Taxation Office, hang up and call Australian Taxation Office yourself on the number from its official website.
- Block the number. On iPhone, open Recents, tap the info button next to the number and choose Block this Caller. On Android, open the Phone app, tap the number in Recents and choose Block.
- Report scams to Scamwatch. If you've lost money or shared details, call your bank straight away, and contact IDCARE on 1800 595 160 for free identity support.
- Getting sales calls? Add your number to the Do Not Call Register.
About 1800 numbers
Calls to 1800 numbers are free, and the business pays. Organisations use them for customer lines but rarely call out from them, so a call showing an 1800 number may be faked.
1800 008 540 is in the 1800 block, which has 1,181 numbers listed on this site. Number details are from the ACMA numbering register, updated 12 October 2026.