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CLI Spoofing
Stop spoofed calls before they trade on someone else’s name.
Subex inspects every call at the signalling layer with Signalling Risk Intelligence and ML-powered detection, catching identity manipulation across SIP and interconnect routes in real time. Spoofing is blocked early in the call lifecycle, not investigated after a subscriber has already been scammed or a brand impersonated. Less scam enablement, enforced identity policies, calling trust kept intact.
Subex inspects every call at the signalling layer with Signalling Risk Intelligence and ML-powered detection, catching identity manipulation across SIP and interconnect routes in real time. Spoofing is blocked early in the call lifecycle, not investigated after a subscriber has already been scammed or a brand impersonated. Less scam enablement, enforced identity policies, calling trust kept intact.
Overview
CLI spoofing manipulates caller identity at the signalling layer to impersonate trusted brands, enterprises, or individuals. By falsifying CLI information across SIP or interconnect routes, fraudsters increase scam success rates and bypass basic screening controls.
Subex enables CSPs to detect signalling-layer spoofing patterns in real time using Signalling Risk Intelligence and multi-signal analytics. The solution helps operators enforce identity policies, reduce scam enablement, and protect both subscribers and enterprise brands.
The Challenge
CLI spoofing enables high-impact scams and account takeovers by disguising caller identity, while fast-changing tactics and limited signalling context weaken enforcement across routes and interconnect partners. The CFCA Global Fraud Loss Survey 2025 estimates losses from spoofing and CLI manipulation at $3.55 billion.
Spoofed caller IDs enable high-impact scams and account takeover attempts.
Spoofing tactics evolve quickly and vary by route and interconnect partner.
Poor visibility into signaling and routing context limits enforcement.
Legitimate use cases (e.g., enterprise PBXs) require careful policy handling.
Real Impact. Real Efficiency. Real Results.
Real-time spoof protection (via Signaling Risk Intelligence)
Detect spoofed calls in real time using signaling-layer signatures and ML model-based algorithms, so CSPs can act earlier in the call lifecycle and reduce customer impact.
Lower scam success rates
Limit identity manipulation to reduce the effectiveness of impersonation and social-engineering scams.
Stronger regulatory posture and customer confidence
Demonstrate tighter control over identity presentation and enforcement, improving trust and helping meet regulatory expectations.
Protection for legitimate enterprise calling
Apply targeted controls that reduce fraud while preserving valid use cases such as enterprise PBXs and authorized CLI presentation.
Better evidence for partner escalation
Provide investigation-ready evidence to support interconnect partner escalation, remediation, and dispute resolution.
Where Channels Meet Control
Inspect signals. Detect spoofing. Mitigate in real-time.
Signaling Risk Intelligence for real-time detection
Leverage signaling-layer signatures and ML model-based algorithms to identify spoofed calls as they occur, minimizing latency and customer exposure.
Multi-signal spoofing detection logic
Combine calling behavior, routing context, and policy checks to flag suspicious identity patterns with higher precision.
Configurable policy controls
Create allow/deny controls by prefix, enterprise, route, and partner-tailored to local regulations and business rules.
Investigation workflow with evidence
Support analyst-led case investigation with contextual evidence and recommended actions to speed up response and standardize handling.
Integration hooks for enforcement and reporting
Connect detections to downstream controls and reporting systems for automated actions, monitoring, and compliance reporting.
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Frequently Asked Questions
Everything you need to know about how our CLI Spoofing solutions work.
Why do fraudsters use CLI Spoofing?
Fraudsters spoof caller IDs to:
- Impersonate banks, government agencies, or enterprises
- Increase answer rates by appearing legitimate
- Bypass call-blocking mechanisms
- Execute large-scale scam and social engineering attacks