- Suspicious
- Scam
Community reports for 03 9003 4543 (0390034543) describe callers falsely claiming to be from Telstra about account security or internet services.
Telstra Impersonation Reports for 03 9003 4543
Four contributors have reported activity from 03 9003 4543 (also written as 0390034543), with two specifically flagging Telstra impersonation attempts. The impersonation calls appear designed to catch recipients off-guard by making urgent-sounding claims about account security or internet services. When questioned directly, the caller from 03 9003 4543 disconnected rather than provide verification details.
What Callers from 03 9003 4543 Claim
Contributors who answered calls from 0390034543 report the caller claimed affiliation with Telstra and made different claims depending on the target. One contributor received a call stating their email had been publicly compromised and needed immediate action. Another report involved the caller telling a younger household member about internet service issues, despite that person being a customer of Optus, not Telstra.
A notable pattern emerged when the caller from 03 9003 4543 hung up immediately upon being questioned about legitimacy. This suggests the caller was unprepared to handle verification requests or provide supporting information.
Report Patterns and Activity Timeline
The two confirmed impersonation reports from 03 9003 4543 occurred within a week of each other in mid-February 2026. Two additional missed calls to the same number in January and early February did not leave voicemails, making it unclear whether they were related attempts. The variation in targets (different household members, different service providers) suggests a broad approach rather than targeted fraud.
What to Do If You Receive a Call from 03 9003 4543
If 03 9003 4543 calls you:
- Do not: Accept claims about account issues, email breaches, or service problems without independent verification
- Do not: Provide personal information, passwords, or banking details
- Do not: Click links or download files the caller suggests
- Do: Hang up and independently contact Telstra using the number on your bill or their official website
- Do: Block the number 03 9003 4543 (0390034543) to prevent future calls
- Do: Report the call if you believe it was fraudulent
How to Report 03 9003 4543
If you receive calls from 03 9003 4543 impersonating Telstra or other companies, report it through these official Australian channels:
- Scamwatch (scamwatch.gov.au) - report impersonation scams and phishing attempts
- ACMA (acma.gov.au) - the Australian Communications and Media Authority handles complaints about telemarketing and unsolicited calls
- Telstra directly - if the impersonation involved their brand, contact their fraud team
- ReportCyber (cyber.gov.au) - if the call involved attempts to access your online accounts
You can also contribute your experience on Reverseau to help other Australians identify this number.
Help others by sharing your experience with (03) 9003 4543!
WRITE A REVIEWRatings Distribution
What Our Users Reviewed
claimed to be from Telstra saying my email went public, hung up when I asked for more info
Called my son claiming to be from Telstra about internet, but he's on Optus
Didn't leave a message
Didn't leave a message when they called
Help others by sharing your experience with (03) 9003 4543!
WRITE A REVIEWFrequently Asked Questions
Why would someone impersonate Telstra and claim my email was public?
Telstra impersonation scams typically use urgent-sounding claims (security breaches, account compromises) to panic recipients into providing sensitive information or payment details without thinking. The vague claim in the report from 03 9003 4543 about an email going public was likely designed to create enough concern that the target would engage rather than hang up. Legitimate Telstra would contact you through verified channels and provide specific account details.
What should I do if 0390034543 claims to be from my internet provider?
Hang up immediately and contact your actual provider using the number on your bill or their official website. Do not use any phone number the caller provides. Callers from 03 9003 4543 have been reported claiming to represent different providers (Telstra in some cases, but targeting Optus customers in another), which is a red flag for impersonation fraud.
Is 03 9003 4543 a known scam number?
Four contributors have reported 03 9003 4543 to Reverseau, with two specifically identifying impersonation attempts. While the number of reports is relatively small, the pattern of misrepresenting identity and disconnecting when questioned suggests fraudulent intent. Community reports help identify emerging scam tactics early.
Why did the caller from 0390034543 hang up when I asked questions?
Scammers often disconnect when their story is questioned because they lack legitimate details to support their claim. One contributor reported the caller from 03 9003 4543 hung up immediately after being asked for more information, which is typical behaviour when the impersonation is exposed. Legitimate companies have prepared responses and verification processes.
Can I report this to Telstra directly since the impersonation involved their brand?
Yes. You should report impersonation of 03 9003 4543 directly to Telstra's fraud team in addition to Scamwatch and ACMA. Telstra can investigate whether their brand is being used in a broader fraud campaign and may take action to block the number from their network.
What if I already provided information to a caller from 03 9003 4543?
If you shared personal information, banking details, or passwords with a caller claiming to be from Telstra or another provider, contact that organisation immediately to report the impersonation and monitor your accounts for suspicious activity. Change any passwords you may have shared, and consider placing a fraud alert on your credit report through Australian credit reporting agencies.