- Scam
A contributor reported a scam call from 03 9039 2739 (0390392739) claiming unauthorised cryptocurrency purchases on a NAB Visa account.
Crypto Fraud Impersonation Reports for 03 9039 2739
One contributor has reported a scam call from 03 9039 2739, also written as 0390392739. The caller claimed that cryptocurrency had been fraudulently purchased using the recipient's NAB Visa account. The recipient does not actually bank with NAB, indicating the caller either had incorrect account information or was using a generic banking impersonation tactic.
This pattern suggests the caller was attempting to create urgency around a false financial threat. By referencing a specific bank and crypto transactions, the scammer aimed to establish false credibility while pressuring the recipient into disclosing personal or financial information.
What the Caller from 03 9039 2739 Claimed
The contributor who received the call from 0390392739 reported that the caller claimed cryptocurrency had been purchased without authorisation. This type of claim is designed to trigger alarm and prompt victims to "verify" their account details or take immediate action.
The fact that the caller referenced NAB specifically, despite the recipient not banking there, suggests the scammer either uses a script mentioning major Australian banks at random, or had obtained a partial or incorrect contact list. Either way, it's a red flag that the caller lacked legitimate knowledge of the victim's actual banking relationships.
Call Details and Attribution
The call to 03 9039 2739 was answered by the contributor, and the number is allocated to Optus Networks in Victoria. The scam was reported on 28 November 2025. The use of a local Victorian number (03 area code) may be intentional, as scammers often use geographically relevant numbers to appear more legitimate and increase answer rates.
What to Do If You Receive a Call from 03 9039 2739
If 03 9039 2739 (0390392739) calls you claiming fraudulent activity on your account:
- Do not: Confirm any personal or banking details, agree to transfer funds, or provide verification information over the phone
- Do: Hang up immediately and contact your actual bank directly using the number on your bank card or statement
- Do: Ask yourself: did the caller know which bank you actually use, or were they guessing
- Do: Block the number 0390392739 on your phone to prevent further contact
- Do: Check your actual accounts for any unauthorised activity by logging in directly through your bank's official app or website
How to Report 03 9039 2739
If you receive a similar call from 03 9039 2739 or 0390392739:
- Report the scam to Scamwatch at scamwatch.gov.au
- Lodge a complaint with the Australian Communications and Media Authority (ACMA) at acma.gov.au
- Report the number to your phone provider (in this case, Optus) so they can investigate the account
- If crypto was involved or cryptocurrency exchanges were mentioned, report to ReportCyber at cyber.gov.au
- Contribute your own experience to Reverseau to help warn other Australians about this number
Help others by sharing your experience with (03) 9039 2739!
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What Our Users Reviewed
SCAM. Claimed crypto was purchased with my NAB Visa acc. I don't bank with NAB.
Help others by sharing your experience with (03) 9039 2739!
WRITE A REVIEWFrequently Asked Questions
Why would a scammer claim crypto was purchased on a NAB account I don't have?
The caller from 03 9039 2739 was using impersonation and urgency tactics. By making a specific claim about a major Australian bank and cryptocurrency, the scammer hoped to panic you into revealing real account details or authorising payments. The fact they got the bank wrong suggests they either use a generic script mentioning major banks, or work from an incomplete or incorrect contact list. This is actually useful information-legitimate banks know which accounts you hold.
Is 0390392739 definitely a scam number?
One contributor has reported a confirmed scam call from 0390392739 (03 9039 2739). The caller impersonated a bank and requested personal information using a false crypto fraud claim. However, one report alone doesn't tell us if the number is permanently compromised or if it was spoofed. Either way, the specific call from 03 9039 2739 claiming NAB crypto fraud was a scam, and you should not engage with inbound calls from this number.
What should I do if 03 9039 2739 calls me?
Do not answer or engage. If 03 9039 2739 does call, hang up immediately without confirming any information. Do not call the number back. Block 0390392739 on your phone. If you're concerned about crypto or banking fraud, contact your actual bank directly using the phone number on your card or statement, or log into your account via the official app. This ensures you're speaking to a genuine representative.
Could 03 9039 2739 be a legitimate Optus number?
The number 03 9039 2739 is allocated to Optus Networks in Victoria, but this doesn't make the call legitimate. Scammers frequently spoof or hijack legitimate phone numbers to appear credible. The fact that the caller from 0390392739 made false claims about crypto fraud and requested personal information confirms the call itself was a scam, regardless of the number's allocation.
Should I report this to the police or just to Scamwatch?
Start with Scamwatch (scamwatch.gov.au) and ACMA (acma.gov.au), as they track scam patterns nationally. If money was transferred or you provided sensitive information to the caller from 03 9039 2739, also report to the Australian Federal Police via cyber.gov.au or your local police station. Most importantly, contact your bank immediately if you believe your account is at risk.
How can I tell if a call claiming banking fraud is real?
Real banks never call to request personal details, passwords, or verification information. They also know which accounts you hold. If 03 9039 2739 or any caller claims fraud on an account, hang up and call your bank directly using the number on your card. Legitimate organisations like NAB will confirm whether they initiated the call. Always initiate the contact yourself rather than responding to an inbound call.