- Spam
- Suspicious
Community reports for 03 9003 7820 (0390037820): 2 suspicious calls with hang-ups and callback evasion. Potential testing or avoidance tactics.
Suspicious Activity Reports for 03 9003 7820
Two contributors have reported suspicious behaviour from 03 9003 7820 (also written as 0390037820). Both incidents suggest deliberate evasion tactics typical of scammers testing phone numbers or avoiding identification. The reports indicate a pattern of calls designed to test responsiveness without genuine contact intent.
What Contributors Experienced with 03 9003 7820
One contributor received a missed call from 03 9003 7820 which they deliberately ignored, noting the single ring approach as a typical scammer testing tactic to verify the number is active. This method - a quick hang-up before the recipient can answer - is used by scammers to build lists of valid, monitored phone numbers for later targeting.
A second report describes a call on April 7, 2026 at 3:52 pm from 0390037820. When the contributor answered immediately, the caller hung up. The contributor then attempted a callback to 03 9003 7820 but received a "user busy" signal, suggesting the number either actively rejected the callback or uses call-screening that blocks return attempts. This behaviour - answering only to disconnect, then blocking return calls - is characteristic of numbers used for harassment or scam testing.
Call Patterns and Timing
Both reports within a week indicate this number may be running systematic call campaigns. The afternoon timing (3:52 pm) aligns with common business hours calling patterns used by organised scam operations. The deliberate hang-ups on both answered and unanswered calls, combined with callback rejection, suggest 0390037820 is part of an active phone number testing or list-building operation rather than a one-off prank.
What to Do If You Receive a Call from 03 9003 7820
If 03 9003 7820 calls you:
- Do: Let unknown calls go to voicemail - legitimate callers will leave a message
- Do: Block the number immediately if it calls again or hangs up when answered
- Do: Never return calls to numbers that hang up on you
- Do not: Answer and engage with the caller
- Do not: Return the call to 03 9003 7820 or any suspicious number
How to Report 03 9003 7820
If you receive calls from 0390037820, report the activity to Australian authorities:
- Report to ACMA (Australian Communications and Media Authority) at acma.gov.au - they investigate unwanted calls and can take action against persistent offenders
- Lodge a report with Scamwatch at scamwatch.gov.au if the calls involve any scam attempt
- Block the number on your phone to prevent future contact
- Report your experience on Reverseau to help other Australians identify this number
Help others by sharing your experience with (03) 9003 7820!
WRITE A REVIEWRatings Distribution
What Our Users Reviewed
Phone marked it spam, this rubbish keeps happening, telcos need to do something
Answered and they instantly cut off
Got a ring which I ignored, typical scammer testing tactic
Rang at 3:52 pm on April 7 2026, hung up the second I answered, tried ringing back and got user busy, likely dodgy
Help others by sharing your experience with (03) 9003 7820!
WRITE A REVIEWFrequently Asked Questions
Why would someone call and hang up immediately from 03 9003 7820?
Hanging up when a call is answered or leaving a single ring is a deliberate testing tactic used by scammers to identify active, monitored phone numbers. These numbers are then added to target lists for future scam campaigns. Community reports for 0390037820 show this exact pattern across multiple calls.
Should I call back a number that hung up on me like 03 9003 7820?
No. Never return calls to numbers that hang up on you. Reports about 0390037820 show that attempting callbacks often results in rejection or "user busy" signals, indicating the number screens return calls. Calling back confirms your number is active and monitored.
Is 03 9003 7820 definitely a scam?
The two reports for 0390037820 describe behaviour consistent with scam operations, specifically phone number testing and list-building tactics. However, they do not yet provide evidence of an actual scam attempt or false claims. The hang-up patterns and callback evasion strongly suggest malicious intent.
What does 'user busy' mean when I try to call back 03 9003 7820?
When a callback to 03 9003 7820 returns "user busy," it typically means the number has active call-screening that blocks return attempts. Scammers use this feature to prevent victims from reaching them while continuing their outbound campaigns from 0390037820.
Why do scammers test phone numbers by calling and hanging up?
Testing calls identify active, monitored phone numbers that belong to real people. Scammers then sell these verified lists to other criminals or use them for follow-up scam campaigns. The reports for 03 9003 7820 show both the initial test (single ring) and callback evasion (hang-up on answer).
Where can I report calls from 03 9003 7820?
Report suspicious calls from 0390037820 to ACMA (acma.gov.au) for investigation, Scamwatch (scamwatch.gov.au) if a scam is attempted, and block the number on your phone. You can also contribute your experience to Reverseau to help other Australians identify this number.