- Unknown
Community report for 04 0338 6403 (0403386403): Optus mobile number making silent calls that disconnect after 3 rings with no message.
Silent Call Report for 04 0338 6403
One contributor has reported receiving a call from 04 0338 6403 (also written as 0403386403) that exhibited typical silent call behaviour. The caller rang the number, allowed it to ring three times, then disconnected without leaving a voicemail or speaking. This pattern is commonly associated with callback scams or automated systems testing whether a number is active.
The number is registered as an Optus mobile service (0403386403), which means it could be either a legitimate mobile user whose account has been compromised or a scammer using a spoofed or hijacked Optus number.
What Silent Calls from 04 0338 6403 Indicate
Silent calls like the one reported from 04 0338 6403 typically serve one of two purposes. First, scammers use them to confirm that a phone number is active and monitored by a real person. Once confirmed, the number may be targeted for follow-up scam calls, often impersonating government agencies, banks, or service providers. Second, if you return the call to 0403386403, you may be connected to a premium service line that charges high fees.
The contributor's experience with 04 0338 6403 matches the callback scam pattern, where silence on answer is deliberate. These calls often occur in batches, with multiple attempts over days or weeks once a number is flagged as active.
What to Do If You Receive a Call from 04 0338 6403
If 04 0338 6403 calls you:
- Do not: Return the call to 0403386403, answer if the number calls again, or press any buttons if a voicemail prompt appears
- Do: Let it go to voicemail, block the number immediately, and monitor your account for follow-up activity
- If it repeats: Report to ACMA at acma.gov.au or contact your Optus account support to verify whether the number is legitimate
How to Report 04 0338 6403
If you receive additional silent calls from 04 0338 6403 or similar patterns:
- Report to the Australian Communications and Media Authority (ACMA) at acma.gov.au - they track silent and nuisance call patterns
- Report to Scamwatch at scamwatch.gov.au if follow-up calls attempt to scam you
- Block 0403386403 on your phone and consider registering on the Do Not Call Register at donotcall.gov.au
- Share your experience on Reverseau to help other Australians identify this behaviour
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What Our Users Reviewed
Called and hung up after three rings, didn't even say anything
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WRITE A REVIEWFrequently Asked Questions
Why would someone call from 04 0338 6403 and hang up without speaking?
Silent calls like the one from 04 0338 6403 (0403386403) are typically used by scammers to confirm your number is active. Once confirmed, they may attempt follow-up scam calls. Alternatively, returning the call to 0403386403 may connect you to a premium service charging high fees. Do not return the call.
Is 04 0338 6403 a real Optus number?
0403386403 is registered as an Optus mobile service, but this doesn't guarantee legitimacy. Scammers often spoof or hijack real mobile numbers, including Optus accounts. The silent call behaviour reported suggests suspicious activity. If you're unsure, contact Optus directly using a number from their official website rather than calling back 04 0338 6403.
What should I do if 04 0338 6403 keeps calling me?
Block 0403386403 immediately on your phone. If the calls persist from this or similar numbers, report to ACMA at acma.gov.au and register on the Do Not Call Register at donotcall.gov.au. Monitor your accounts for any suspicious activity, as callback scammers often follow silent calls with targeted impersonation scams.
Could 04 0338 6403 be a legitimate business?
The silent call pattern from 04 0338 6403 is not typical of legitimate businesses. Real companies identify themselves, leave voicemails, or request a return call by stating their name. The three-ring hang-up from 0403386403 matches callback scam behaviour. If you have business pending with someone, contact them directly using a verified phone number.
How do I know if 0403386403 is spoofed?
You cannot determine spoofing directly from a received call. However, the silent call from 04 0338 6403 is a strong indicator of suspicious activity. Contact Optus using their official customer service number to report potential account compromise. Report the call to ACMA, who can investigate whether 0403386403 is legitimately registered or spoofed.
Should I add 04 0338 6403 to my Do Not Call list?
Yes. Register your number on the Do Not Call Register at donotcall.gov.au if you're receiving unwanted calls. Additionally, block 0403386403 directly on your phone. For silent calls from 04 0338 6403, also report to ACMA at acma.gov.au, as they specifically track nuisance and silent call patterns.