- Uncertain
2 reports for 04 0103 4991 (0401034991). Contributors received calls from this Optus mobile number but couldn't identify the caller. Check who called with community insights.
Unknown Caller Reports for 04 0103 4991
Two contributors have reported receiving calls from 04 0103 4991 (also written as 0401034991), an Optus mobile number. Both callers left no message and provided no identifying information when answered, leaving contributors uncertain about who was on the line.
The reports for 0401034991 indicate standard outbound call activity, though contributors were unable to determine the caller's purpose or identity. Neither report mentions aggressive behaviour, specific claims, or follow-up contact attempts.
Report Patterns
Both calls to 04 0103 4991 came through as answered calls, occurring on the same day in January 2026. The calls came within a few hours of each other, in the early morning (around 7:48 AM) and mid-morning (around 9:53 AM) timeframes.
Since this is an Optus mobile number, it could be from a private individual, a business using a personal mobile line, or a forwarded business number. Without additional information from the callers or voicemail content, contributors were unable to classify the calls beyond "unknown."
What to Do If You Receive a Call from 04 0103 4991
If 0401034991 calls you and you don't recognise the number:
- Do: Let the call go to voicemail if you don't recognise the number
- Do: Ask the caller to identify themselves and state their purpose before sharing any information
- Do: Block the number if calls are unwanted or persistent
- Do: Check any voicemail left to understand why they called
- Do not: Share personal information with unknown callers
- Do not: Return the call if you're unsure who it is
How to Report 04 0103 4991
If you receive calls from 04 0103 4991 that concern you, you can report them:
- Add your own report to Reverseau to help other contributors identify this number
- If the calls are unwanted or harassing, report to the Australian Communications and Media Authority (ACMA) at acma.gov.au
- If you suspect fraud or scam activity, report to Scamwatch at scamwatch.gov.au
- Block the number in your phone settings to prevent future calls
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Got a call, no idea who it was
Got a call, no idea who it is
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WRITE A REVIEWFrequently Asked Questions
Why do I have reports for 04 0103 4991 if no one knows who it is?
Both contributors received calls from 04 0103 4991 (0401034991) and answered, but the callers didn't identify themselves or leave a message. By reporting the number to Reverseau, contributors help others recognise if they get called from the same number. This builds a community record of unknown or unexplained calls.
Is 0401034991 a scam or spam number?
Based on current reports, 04 0103 4991 cannot be classified as scam or spam - it's simply unidentified. The two contributors who answered calls from 0401034991 received no sales pitch, threat, or suspicious claims. It may be a legitimate call from a business, organisation, or individual who didn't state their purpose.
What should I do if 04 0103 4991 keeps calling me?
If 0401034991 calls repeatedly and you don't recognise the number, block it in your phone settings. You can also report repeated unwanted calls to ACMA at acma.gov.au. If the pattern changes or you receive suspicious messages, add a report to Reverseau to help track any new behaviour from this number.
Could 04 0103 4991 be a legitimate business?
It's possible. 0401034991 is an Optus mobile number, which could belong to a business, contractor, or service provider using a personal mobile line. If you're expecting a call from someone and see 04 0103 4991 as a missed call, try calling back or checking your voicemail to confirm their identity before reporting.
How can I find out who called from 0401034991?
Start by checking your phone's call log for any voicemail or text message context. If the caller is legitimate, they typically leave a voicemail explaining who they are and why they called. You can also check Reverseau for community reports about 04 0103 4991. If you need help, you can try a reverse phone lookup or ask contacts if they recognise the number.
Should I be worried about calls from 04 0103 4991?
Not necessarily. Current reports for 0401034991 show only that callers didn't identify themselves - there are no reports of threats, scams, or aggressive behaviour. However, it's always sensible practice to not share personal details with unknown callers. If the calls become frequent or threatening, then report to ACMA or add a report to Reverseau.