- Scam
One community report for 04 0173 4020 (0401734020), an Optus mobile number flagged for missed calls with no voicemail left.
Nuisance Call Report for 04 0173 4020
A single contributor has reported receiving a call from 04 0173 4020 (also written as 0401734020), an Optus mobile number. The caller did not leave a voicemail message, and the contributor missed the call. This type of silent or no-message call pattern can indicate either accidental dialling or deliberate contact testing by telemarketers and scammers probing for active numbers.
The report for 0401734020 was submitted on 30 October 2025. While one report alone does not establish a clear pattern, repeated silent calls from the same number warrant attention and blocking.
What to Do If 04 0173 4020 Calls Again
If you receive another call from 04 0173 4020:
- Do: Let unknown calls go to voicemail and listen for a message before returning the call
- Do: Block the number immediately if 04 0173 4020 calls repeatedly without leaving a message
- Do: Check your recent call list to see if this is a pattern of repeated contact
- Do not: Return the call or engage with the caller
- Do not: Share personal information if you happen to answer
Report Patterns and Timing
The reported call from 04 0173 4020 occurred during morning hours (approximately 8:22 AM on a Thursday). With only one report, no broader calling pattern can be established. However, if you receive multiple calls from 0401734020 at unusual times or in quick succession, this would suggest deliberate contact attempts rather than a misdialled number.
How to Report 04 0173 4020
If you receive unwanted calls from 04 0173 4020, you have several options:
- Block on your phone: Most Australian mobile providers allow you to block specific numbers through your phone's settings or your provider's app
- Register with Do Not Call Register: Visit donotcall.gov.au to add your number to the national Do Not Call Register. Telemarketing calls to registered numbers may be unlawful
- Report to ACMA: If the calls persist or become harassing, report them to the Australian Communications and Media Authority (ACMA) at acma.gov.au
- Contribute to Reverseau: Report your experience with 04 0173 4020 on Reverseau to help other Australians identify this number
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WRITE A REVIEWFrequently Asked Questions
What does it mean if 04 0173 4020 calls but leaves no message?
Silent or no-message calls can indicate several things: accidental dialling, a telemarketer testing whether your number is active, or a scammer confirming contact details. One contributor reported exactly this behaviour from 04 0173 4020 (0401734020). If 04 0173 4020 calls repeatedly without leaving voicemail, it's wise to block the number.
Should I call back a missed call from 04 0173 4020?
No. You should not return calls to unknown numbers, especially ones that do not leave voicemail messages. If 04 0173 4020 is a legitimate contact trying to reach you, they will leave a message or contact you through another channel. Returning the call to 0401734020 could expose you to premium-rate numbers or connect you to scammers.
Is 04 0173 4020 a known scam number?
Based on current community reports, 04 0173 4020 has one report describing a silent missed call with no voicemail left. This single report is not enough to classify 0401734020 as a confirmed scam, but the behaviour is consistent with nuisance calling patterns. If you experience repeated calls from 04 0173 4020, block it and report to ACMA.
What should I do if 04 0173 4020 keeps calling?
If 0401734020 calls repeatedly, block the number immediately on your mobile phone. You can usually do this through your phone's settings or your Optus account if the number is registered to an Optus service. If the calls continue after blocking or come from multiple numbers, report the harassment to ACMA at acma.gov.au or contact your provider's fraud team.
Can I report 04 0173 4020 to the Do Not Call Register?
The Do Not Call Register (donotcall.gov.au) is for telemarketing calls. While you can register your own number there to prevent future telemarketing contact, reporting a specific number like 04 0173 4020 (0401734020) for harassment is better handled through ACMA. You can make a complaint at acma.gov.au if the calls are persistent or unwanted.
Why might an Optus number like 04 0173 4020 be calling with no message?
Optus mobile numbers like 0401734020 can be used by anyone with an Optus contract, including telemarketers, scammers, or individuals with spoofed or stolen credentials. A silent call with no voicemail from 04 0173 4020 suggests the caller either dialled by mistake or was testing the line. Do not engage, block the number, and report it if the pattern continues.