Suspicious calls exhibit risk indicators that warrant monitoring but lack sufficient community consensus to confirm scam classification. These reports often involve numbers with unusual calling patterns — brief or silent connections, single-ring callback attempts, or callers making unverified claims. The ACMA recognises these patterns as potential indicators of telecommunications fraud reconnaissance.
Suspicious classifications frequently evolve as additional community reports provide clearer signal. Many numbers transition from suspicious to confirmed scam or are reclassified as spam once calling intent becomes apparent. This transitional nature makes the suspicious category a valuable early warning layer in the intelligence framework, often surfacing emerging campaign types before they reach high-volume scam status.
National Snapshot
Last updated: 2 March 2026
Latest Suspicious Reports
Most recently reported suspicious phone numbers from community submissions.
Risk levels are dynamically calculated based on cumulative report frequency and classification signals across the community reporting network.
Common Patterns in Suspicious Activity
Suspicious number patterns typically involve behaviour that community members cannot verify through standard channels, often overlapping with reconnaissance activity where operators test number validity before launching targeted campaigns.
- Silent & brief calls — Connections lasting under 3 seconds with no audio, designed to confirm active numbers
- Single-ring callbacks — One-ring disconnections prompting recipients to return the call, potentially connecting to premium-rate services
- Unverified caller claims — Callers claiming to represent organisations but unable to provide verifiable reference numbers or callback details
- Number range probing — Sequential calls across number blocks suggesting automated validity testing
Geographically, suspicious activity tends to mirror scam distribution patterns but with wider dispersion, suggesting broader testing of number ranges prior to campaign concentration.
How to Protect Yourself from Suspicious Calls
Exercise caution with calls from unrecognised numbers that exhibit unusual patterns such as single-ring disconnections or silent connections. These may be testing whether your number is active. Avoid returning calls to unfamiliar numbers, particularly those with international or premium-rate prefixes.
Contributing reports for suspicious numbers helps the community build classification consensus more quickly, accelerating the transition from uncertain to confirmed risk assessment.
Monthly Trends
Reporting volume decreased by 22% in 2026-02 compared to the prior month, with 1,997 unique numbers reported.
Peak month: 2025-07 (3,461 reports)
| Month | Reports | Unique Numbers |
|---|
| 2026-02 |
2,208 |
1,997 |
| 2026-01 |
2,826 |
2,437 |
| 2025-12 |
1,857 |
1,668 |
| 2025-11 |
3,137 |
2,705 |
| 2025-10 |
3,119 |
2,752 |
| 2025-09 |
2,871 |
2,560 |
| 2025-08 |
2,839 |
2,511 |
| 2025-07 |
3,461 |
2,917 |
| 2025-06 |
3,151 |
2,592 |
| 2025-05 |
1,096 |
976 |
| 2025-04 |
992 |
866 |
| 2025-03 |
1,350 |
1,161 |
This intelligence is derived from community-submitted reports and represents collective classification rather than legal determination. All data is processed in accordance with Reverseau’s classification methodology, which prioritises transparency and consensus-based assessment. As reporting volume grows across Australian states and territories, classification accuracy improves through consensus convergence — strengthening the community intelligence layer that supports early detection and awareness.
For official telecommunications safety advice, refer to the Australian Communications and Media Authority (ACMA) and Scamwatch (ACCC).
Data coverage: 2014–Present · Last reviewed: 2 March 2026 · Source: Community-submitted reports