- Suspicious
Community reports for 02 4420 5440 (0244205440): Silent calls that hang up after seconds, persistent ringing with no voicemail, and blank messages.
Silent Calls from 02 4420 5440
Three contributors have reported activity from 02 4420 5440 (also written as 0244205440), a local NSW number allocated to Symbio Networks. The reports describe a pattern of silent or blank calls - a common hallmark of robocall campaigns and callback scams that attempt to identify active phone numbers.
One contributor answered a call from 02 4420 5440 and experienced a blank call that disconnected within seconds. Two additional reports mention persistent ringing without voicemail being left, suggesting automated dialling rather than a genuine business inquiry.
What Callers from 02 4420 5440 Do
The silence pattern reported for 0244205440 is characteristic of robocall systems that dial large numbers sequentially. When a human answers, the automated system either disconnects or transfers to an operator - but in these cases, the calls terminate without any attempt at conversation.
Contributors noted that 02 4420 5440 keeps ringing repeatedly without leaving voicemail messages. This behaviour suggests the caller is attempting to confirm the number is active rather than seeking genuine contact, a tactic commonly used in callback scams where scammers later impersonate banks, government agencies, or tech support services.
Report Patterns
Reports spanning from January 2024 to November 2025 show ongoing activity from this number. The calls have come through both answered calls and missed calls, with at least one blank voicemail left on record. The consistency of blank or silent contact attempts indicates a systematic campaign rather than isolated incidents.
What to Do If You Receive a Call from 02 4420 5440
If 02 4420 5440 calls you:
- Do not: Press any numbers, speak into the silence, or stay on the line - this confirms your number is active
- Do not: Return the call or respond to any follow-up contact
- Do: Let the call go to voicemail if possible
- Do: Block the number immediately in your phone's contacts or using your provider's call-blocking feature
- Do: Be alert for follow-up contact claiming to be from your bank, the ATO, NBN, or tech support - these often follow silent calls
- Do: Hang up immediately if any caller references a previous call from 02 4420 5440
How to Report 02 4420 5440
If you receive silent, blank, or harassing calls from 02 4420 5440, report the activity to Australian authorities:
- ACMA (Australian Communications and Media Authority): File a complaint at acma.gov.au - they investigate nuisance calls and can take action against service providers
- Scamwatch: If the calls appear linked to any follow-up scam attempt, report to scamwatch.gov.au
- Your phone provider: Contact Symbio Networks or your own service provider's abuse team to request blocking
- Do Not Call Register: Register your number at donotcall.gov.au if you haven't already - silent calls may breach the Do Not Call legislation
- Reverseau: Add your experience to our community reports to help other Australians identify this number
Help others by sharing your experience with (02) 4420 5440!
WRITE A REVIEWRatings Distribution
What Our Users Reviewed
Blank call, hung up after a few seconds
Keep ringing and won't leave voicemail
Called left a blank message. Probably a scam cal.
Help others by sharing your experience with (02) 4420 5440!
WRITE A REVIEWFrequently Asked Questions
Why do I keep getting silent calls from 02 4420 5440?
Silent calls like those from 02 4420 5440 (0244205440) are typically generated by automated robocall systems designed to identify active phone numbers. The system dials large batches of numbers; when someone answers, the silence or immediate hang-up confirms the number is in use. This list is then sold or used for follow-up scams. Multiple contributors have experienced this pattern with 02 4420 5440.
Should I answer or call back 02 4420 5440?
No. Do not answer calls from 02 4420 5440 if you can help it, and do not call back. Answering or calling back confirms your number is active and monitored. Silence on the line or a hang-up after you answer is a sign of an automated system - there is no legitimate contact being attempted. Block 0244205440 immediately.
What happens after silent calls from numbers like 02 4420 5440?
After a silent call number like 02 4420 5440 has confirmed your number is active, you may receive follow-up calls impersonating your bank, the ATO, NBN, or tech support services. These secondary calls use your confirmed number to attempt fraud or extortion. If you later receive an urgent call claiming to be from an official organisation, hang up and verify by calling the official number directly.
Can I block 02 4420 5440 on my phone?
Yes. Most phones allow you to block numbers in Settings (iOS) or the Phone app (Android). You can also contact your service provider - in this case, Symbio Networks or your own provider - and request they block 0244205440 at the network level. Reporting to ACMA at acma.gov.au can also flag the number for investigation and potential blocking.
Is 02 4420 5440 a real business number?
02 4420 5440 is allocated as a local service number in NSW to Symbio Networks Pty Ltd, a legitimate Australian internet service provider. However, this does not mean the number is being used legitimately. Scammers and robocall operators often spoof or misuse legitimate provider numbers, or the provider's infrastructure may have been compromised. The pattern of silent calls and no voicemail from 0244205440 is not consistent with legitimate business contact.
Where can I report silent calls from 02 4420 5440?
Report silent calls from 02 4420 5440 (0244205440) to ACMA at acma.gov.au, which investigates nuisance and silent calls. You can also lodge a complaint with the Do Not Call Register at donotcall.gov.au. If you suspect a follow-up scam, report to Scamwatch at scamwatch.gov.au. Reporting on Reverseau helps alert other Australians to this number's activity.