- Suspicious
- Scam
03 9935 1866 (0399351866) flagged for robocall activity and persistent spam calls. Community reports indicate repeated dialling despite Do Not Call registration.
Robocall Reports for 03 9935 1866
Three contributors have flagged 03 9935 1866 (also written as 0399351866) for unwanted call activity. One report specifically describes robocall characteristics, with the contributor receiving multiple calls from this number and reaching a voicemail that sounded like a chaotic call centre environment on the second attempt.
The allocation data shows 0399351866 is registered to Optus Networks in Victoria. Contributors describe a pattern of persistent calling despite efforts to block the number, with suggestions that new numbers are being used after old ones are blocked, indicating coordinated spam campaign behaviour.
Call Patterns and Reporting Behaviour
The most recent report about 03 9935 1866 came in late January 2026, with earlier activity in early February. One contributor noted receiving two calls from this number within a short timeframe. The robocall aspect was confirmed by the voicemail left during the second call, which the contributor described as originating from what sounded like a busy call centre.
Contributors expressing frustration about 0399351866 mention the number's persistence and the broader pattern of spam operators cycling through numbers to evade Do Not Call Register blocking. This behaviour is characteristic of organised spam operations rather than isolated scam attempts.
What to Do If You Receive a Call from 03 9935 1866
If 03 9935 1866 calls you:
- Do not: Answer unknown numbers, return the call, or engage with any message left on voicemail
- Do: Let calls go to voicemail, block the number immediately in your phone settings, and report to the Do Not Call Register if you're registered
- Check registration: Verify your number is listed on the Do Not Call Register at donotcall.gov.au - if registered and still receiving calls, this strengthens your complaint
- Report pattern calls: If you receive multiple calls from this or similar numbers within days, document the dates and times for your report
How to Report 03 9935 1866
Report this number through official Australian channels:
- ACMA (Australian Communications and Media Authority): Report spam and robocalls at acma.gov.au - ACMA investigates persistent spam patterns
- Scamwatch: If the calls include scam claims or financial requests, report to scamwatch.gov.au
- Do Not Call Register: Check your registration and lodge a complaint at donotcall.gov.au if you're receiving calls despite registration
- Reverseau: Contribute your experience with 0399351866 to help other Australians identify this number
Understanding Robocall Tactics
The voicemail from 03 9935 1866 described as originating from a chaotic call centre is a common robocall characteristic. Robocalls typically use automated dialling systems to reach large numbers of people rapidly, with actual operators only engaging when someone answers or leaves voicemail. The pattern of repeated calls to the same number, followed by blocking and resumption from new numbers, suggests an organised operation using multiple phone numbers as a workaround to Do Not Call protections.
Help others by sharing your experience with (03) 9935 1866!
WRITE A REVIEWRatings Distribution
What Our Users Reviewed
Two calls from this number, second time got voicemail that sounded like a chaotic call centre
Another filthy grub scammer number.
This SCAMMER grub calls Do Not Call Numbers everyday using new numbers after old ones get blocked.
You sir are a fool & a moron.
You get no cash - NOTHING.
Help others by sharing your experience with (03) 9935 1866!
WRITE A REVIEWFrequently Asked Questions
What does it mean when a voicemail from 03 9935 1866 sounds like a call centre?
A voicemail that sounds chaotic or like a busy call centre is typical of robocall systems. These automated systems dial many numbers simultaneously and only record voicemail when the call connects but no one answers. The background noise contributors heard from 0399351866 indicates an automated dialling system rather than a targeted personal call.
Why does 03 9935 1866 keep calling if I blocked it?
Contributors report that spam operators behind 0399351866 appear to use multiple phone numbers in sequence after old ones are blocked. This is a known tactic to circumvent Do Not Call Register protections. If you're registered on the Do Not Call Register and still receiving calls, report this pattern to ACMA at acma.gov.au.
Is 0399351866 a scam or just spam?
Reports about 03 9935 1866 describe it as spam and robocall activity rather than a specific scam with financial or personal information demands. However, robocall campaigns often precede scam attempts. Block the number and do not engage if 0399351866 or similar numbers call again.
What should I do if I answered a call from 03 9935 1866?
If you answered 0399351866, hang up immediately if anyone speaks. Do not press any numbers, provide personal information, or return the call. Block the number in your phone settings and report it to ACMA and the Do Not Call Register if you're registered.
Does 03 9935 1866 being on Optus mean Optus is behind the calls?
No. The allocation shows 0399351866 is a local service number registered through Optus Networks in Victoria, but this does not mean Optus is responsible for the spam. The number has likely been compromised or spoofed by spam operators. Report to ACMA rather than Optus directly.
Should I report 0399351866 if I didn't answer the call?
Yes. Even if you missed the call from 03 9935 1866, report it to Reverseau to contribute to the community record. If the calls repeat, log each one and report the pattern to ACMA and the Do Not Call Register, as persistent calling despite registration strengthens your complaint.