03 9137 6750 - 0391376750: Silent Calls and Personal Info Requests

• Suspicious
• Scam

03 9137 6750 (0391376750): Community reports of silent calls and requests for personal information including full name and date of birth.

Silent Calls and Personal Information Requests from 03 9137 6750

Two contributors have reported concerning activity from 03 9137 6750 (also written as 0391376750), a local service number registered to Optus Networks in Victoria. The reports describe two distinct patterns: silent calls with no response, and a caller requesting sensitive personal information without legitimate identification.

One contributor received two consecutive silent calls from 0391376750. Both calls connected but produced only silence, with no voicemail left after either attempt. Silent calls of this type often precede callback scams or are used to confirm a number is active for later targeting.

A separate report about 03 9137 6750 involved a caller who directly asked for the contributor's full name and date of birth. When the contributor refused and requested the caller identify themselves and their purpose, the caller provided no information and the call ended. This behaviour is characteristic of social engineering attempts gathering personal data for identity fraud or account takeover.

What Callers from 03 9137 6750 Do

The two reports from contributors paint a picture of potential reconnaissance activity. Silent calls serve as probing mechanisms-callers use them to verify a number is active and monitor when someone answers. A contributor who picked up during the silent calls from 03 9137 6750 may now be marked as a live target for follow-up contact.

The personal information request is equally concerning. The caller from 0391376750 did not claim any affiliation, did not explain why they needed the data, and immediately hung up when questioned. This refusal to identify themselves or justify the request is a major red flag. Legitimate organisations-banks, government agencies, utilities-will always provide their name, department, and reason for the call before requesting sensitive details like date of birth.

Report Patterns and Timing

Both reports were received months apart (May and November 2025), suggesting either sporadic targeting of this number or activity from different callers using the same Optus-registered line. The silent call report came from an answered call, indicating the contributor was home and available to answer.

Given that 03 9137 6750 is allocated as a local service number by Optus in Victoria, the caller may be spoofing or legitimately using the number. The combination of silent calls followed by personal data harvesting attempts is consistent with organised fraud activity rather than random telemarketing.

What to Do If You Receive a Call from 03 9137 6750

If 03 9137 6750 calls you:

• Do not: Answer unknown numbers if you can help it, return the call, or provide any personal information
• Do: Let unknown calls go to voicemail, block the number immediately after a silent call, and save evidence of the call in your phone logs
• If the caller asks for personal details: Hang up without engaging. Legitimate organisations never ask for sensitive information unsolicited. If you think the call might be genuine, hang up and call the organisation back using an official number from their website or a bill you trust
• Do not: Assume silence means the call disconnected. Many callback scams begin with testing calls to identify active numbers

What to Do If You Receive Multiple Calls from 03 9137 6750

Repeated calls from 0391376750, especially silent calls, indicate your number has been flagged for targeting. Take these steps:

• Block the number in your phone's settings immediately
• Do not call back-this confirms your number is active and monitored
• Note the dates and times of calls in a document or screenshot
• Report the number to the Australian Communications and Media Authority (ACMA) and Scamwatch if the pattern continues

How to Report 03 9137 6750

If you receive silent calls or unsolicited personal information requests from 03 9137 6750, report the activity to Australian authorities:

• Report to ACMA: Visit acma.gov.au and use their complaint portal. ACMA investigates telemarketing violations, silent calls, and misuse of telecommunications services
• Report to Scamwatch: Visit scamwatch.gov.au and provide details of the call, including the date, time, and what the caller said or did
• Report as spam/scam: Most phone providers allow you to report numbers directly through your phone's call history. On most Android and iOS devices, you can report the number when you block it
• Contribute to Reverseau: Add your experience with 0391376750 to our community database so other Australians can recognise the number and protect themselves

Understanding Callback Scams and Data Harvesting

The pattern seen with 03 9137 6750 matches two common fraud tactics. Silent calls are often used in callback scams where fraudsters call to confirm a number is active, then later contact the same number pretending to be from a bank or authority. Personal information requests without proper identification are social engineering attacks-gathering details needed to impersonate you, access your accounts, or commit identity fraud.

The fact that the caller from 0391376750 immediately ended the call when questioned suggests they were testing responses, not conducting a legitimate transaction. Legitimate callers persist, explain their purpose, and provide verifiable information. Fraudulent callers disappear when challenged.

Frequently Asked Questions