Multi-IMSI Support Without Multi-Core Complexity

As global IoT and eSIM deployments scale, supporting multiple IMSI ranges efficiently is critical.

Traditional approaches often require separate core network instances per IMSI range, increasing cost, complexity, and operational overhead.

Stacuity removes this constraint.

Our software-defined Core Network-as-a-Service enables multiple IMSI ranges to be supported within a single logical core, delivering the flexibility of multi-core architectures, without the duplication.

Support for Multiple IMSI Ranges in One Core

Stacuity’s platform is built to handle diverse IMSI ranges natively, allowing connectivity providers to:

• Onboard new IMSI ranges rapidly without deploying new infrastructure
• Maintain logical separation between partners, regions, or use cases
• Apply independent policy, routing, and commercial models per IMSI
• Scale globally through a single, unified platform

This aligns with Stacuity’s core principle: software-defined control over mobile connectivity at scale

Each IMSI range can be treated as an independent logical entity within the platform.

This enables:

• Granular routing control (local, regional, or central breakout)
• Policy and security enforcement per IMSI or use case
• Commercial and charging flexibility across partners
• Support for data sovereignty and regulatory requirements

This is all delivered through a multi-tenant, API-driven architecture, consistent with Stacuity’s broader platform design.

In a multi-IMSI deployment, IMSI selection is handled at the SIM level—not by the core network.

• The SIM or eSIM contains multiple IMSIs
• A SIM-based applet selects the active IMSI
• Selection logic is managed via OTA platforms provided by SIM vendors

Stacuity’s role is to ensure that any IMSI presented to the network is fully supported, including:

• Authentication and session handling
• Policy enforcement and routing
• Consistent service delivery across all IMSI ranges

This ensures seamless interoperability with any compliant SIM or eSIM provider ecosystem.

Stacuity’s Edge-as-a-Service extends multi-IMSI capabilities beyond the core.

Traffic can be controlled and optimised per IMSI across the global edge network:

• Route traffic to the optimal edge location for performance or cost
• Apply policy-based breakout aligned to use case requirements
• Support regulatory and data residency constraints
• Deliver consistent service behaviour across all IMSIs

This enables providers to combine multi-IMSI flexibility with edge-native control and performance.

Stacuity enables connectivity providers to:

• Accelerate onboarding of new IMSI ranges
• Reduce infrastructure and operational complexity
• Maintain full control over routing, policy, and commercial models
• Integrate seamlessly with existing SIM and OTA ecosystems
• Deliver global connectivity through a single, scalable platform

Multi-IMSI is a foundational capability for modern IoT and eSIM deployments.

Stacuity enables providers to adopt multi-IMSI strategies without the constraints of traditional core architectures, while unlocking the full value of a programmable, software-defined mobile network.