03 9955 3000 | How to verify calls from this Australian number

The phone number (03) 9955 3000 is an Australian landline number associated with Melbourne/Victoria, often reported in connection with calls claiming to be from ANZ Bank.

Some people report legitimate ANZ-related callbacks or dispute/credit-card enquiries from this number, while many others report scam or spoofed calls pretending to be ANZ and asking for personal or banking details.

Because scammers can easily spoof real-looking numbers, you should treat any unexpected call from this number as suspicious: do not share personal or banking information, and instead hang up and call ANZ using a verified number from their official website or your bank card if you need to check anything.


Why are they calling?

If you receive a call from this number, it is usually regarding:

  • An overdue payment on a credit card, personal loan, or mortgage.

  • An account that has gone into arrears (negative balance).

  • A reminder to update payment details.


⚠️ Safety Warning: Watch out for “Spoofing”

Banks are the #1 target for caller ID spoofing. Scammers can use technology to make their phone number appear as 03 9955 3000 on your screen, even if they are calling from overseas.

How to verify if it’s really NAB:

  1. Do not pay over the phone immediately: If the caller becomes aggressive or demands you transfer crypto or buy gift cards, hang up. NAB will never ask for that.

  2. Check your App: Log in to the official NAB app or Internet Banking. If you genuinely have an overdue payment or an alert, it will usually be flagged there.

  3. Call them back on a public number: Instead of pressing redial, call NAB’s main line on 13 22 65 (or the number on the back of your debit card) and ask to be transferred to the Collections team.

Also Read : 03 9278 1615 | What organisation uses the number 03 9278 1615

How to check the number

  • Look up the number on trusted reverse-lookup or caller-ID services (for example, widely used apps and websites that let you see user reports on that number) to see if others have flagged it as spam or linked it to a known business.​

  • Search the number in a web browser together with keywords like “scam” or the claimed company name (for example, “03 9955 3000 ANZ”) to see recent reports, but still treat results as indicative only, not proof.

Steps you can take to keep your account safe

You’ve received a suspicious email, SMS, or phone call

If you haven’t clicked any links or shared any information, hang up immediately or delete the message. You can also send it to phish@nab.com.au or SMS it to 0476 220 003 (047 NAB 0003). There’s no need to call.

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