- Suspicious
- Uncertain
- Spam
3 reports for 02 4086 5103 (0240865103): silent calls with long connection delays, no voicemail left. Contributors flagged as spam.
Nuisance Call Reports for 02 4086 5103
Three contributors have reported calls from 02 4086 5103 (also written as 0240865103), a NSW local service number allocated to Symbio Networks. The common thread across reports is the caller's pattern of ringing without leaving a message and disconnecting when contact is made.
The reports suggest 0240865103 may be an automated or semi-automated dialling system rather than a genuine caller attempting to reach recipients. One contributor noted the call took an unusually long time to connect before they hung up, a common indicator of robocall or predictive dialler behaviour where the system rings multiple numbers simultaneously.
What Callers from 02 4086 5103 Do
Reports consistently describe the same behaviour pattern from 0240865103. The number rings through to screened phone lines and mobile devices but does not leave a voicemail message. When answered, contributors experience a delay before any response, suggesting automated call routing or connection issues typical of mass dialling operations.
- Calls arrive with no identification or caller name displayed
- Connection delay occurs before any audio or response
- No message left if call goes unanswered
- Caller disconnects rather than speaking to the person who answers
Call Patterns and Timing
Reports span several days in September 2026. One call was missed on 14 September, a second call was answered on 11 September (where the contributor experienced connection lag and marked as spam), and a third call reached a screened line on 10 September.
The behaviour of repeatedly calling screened numbers without leaving a message is consistent with either telemarketing list-cleaning (where callers verify active numbers without intent to sell) or robocall/scam infrastructure testing numbers for responsiveness. A contributor who took the call on 11 September reported the connection delay was significant enough to warrant hanging up and manually flagging 02 4086 5103 as spam on their phone.
What to Do If You Receive a Call from 02 4086 5103
If 0240865103 calls you:
- Do not: Answer if you don't recognise the number, return the call, or engage if the line is silent
- Do: Let it go to voicemail, block the number (02 4086 5103) on your phone, and mark as spam or scam
- If you answered: Hang up immediately if there is a delay or silence on the line - do not stay on the call waiting for someone to speak
Do not attempt to call 02 4086 5103 back, as this confirms your number is active and monitored by whoever controls the dialling system.
How to Report 02 4086 5103
If you receive repeated unwanted calls from 02 4086 5103 or 0240865103, report the number through these Australian government and regulatory channels:
- ACMA (Australian Communications and Media Authority): acma.gov.au - Report unwanted calls and robocalls
- Do Not Call Register: donotcall.gov.au - Register your number to opt out of telemarketing calls
- Scamwatch: scamwatch.gov.au - If you suspect the calls are part of a scam
- Reverseau: Report this number on Reverseau to help other Australians identify who called them
If the calls persist despite blocking, contact your phone provider (in this case, Symbio Networks may have records of the outbound calls). You can request that your provider investigate the source of calls from numbers they allocate.
Help others by sharing your experience with (02) 4086 5103!
WRITE A REVIEWRatings Distribution
What Our Users Reviewed
Unknown number, rings no message left.
Took ages to connect so I hung up, flagged as spam on my phone
Calls my screened line but leaves nothing
Help others by sharing your experience with (02) 4086 5103!
WRITE A REVIEWFrequently Asked Questions
What does it mean when a call connects but takes ages to link through?
A significant delay between answering and hearing audio is a red flag for automated calling systems, often used in robocall or telemarketing campaigns. One contributor who answered 02 4086 5103 reported exactly this experience before hanging up. This delay occurs because predictive diallers ring multiple numbers at once and only connect you to an operator when someone answers - if no operator is available, you hear silence or hold tone. Hang up immediately rather than waiting.
Why would a caller ring repeatedly but leave no message?
Reports about 0240865103 show a pattern of calls with no voicemail, which suggests the caller is either list-verifying (confirming your number is active without intent to communicate) or testing the responsiveness of numbers for later scam or spam use. Legitimate businesses always leave a message if they need to contact you. Repeated calls without messages should be blocked.
Is 02 4086 5103 a legitimate business number?
The number is allocated to Symbio Networks, a NSW-based service provider, and carries a local service designation. However, allocation to a legitimate provider does not guarantee the current calls are legitimate - the number may be spoofed by scammers, or the provider may have poor outbound call controls. Three community reports describe silent or non-responsive calling behaviour inconsistent with legitimate business practice. Do not assume legitimacy based on allocation alone.
Should I block 02 4086 5103 on my phone?
Yes. All three contributors who reported 0240865103 experienced unproductive calls where no message was left and no business purpose was communicated. Blocking costs nothing and stops the number reaching you. If the caller has a genuine reason to contact you, they will leave a voicemail or reach you through other verified channels.
What should I do if I answered 02 4086 5103 and heard silence?
Hang up immediately. Do not stay on the line waiting for someone to speak. A contributor who experienced a connection delay when answering 0240865103 correctly hung up and flagged the number as spam. Do not provide any information, do not press any keys, and do not try to ask who is calling. Then block the number on your phone and report it to the Do Not Call Register at donotcall.gov.au.
Can I report this to my phone provider?
Yes. If you receive repeated unwanted calls from 02 4086 5103, contact your phone provider's customer service and report the number. You can also request they investigate calls originating from numbers they allocate (in this case, Symbio Networks). Additionally, lodge a report with ACMA at acma.gov.au, which tracks patterns of unwanted calling and can take action against providers who fail to prevent misuse of their networks.