---
title: Inventory
description: Manage telecommunications inventory and resource allocation
---

Inventory holds the telecom resources of a brand: the phone numbers, the SIM cards, and the
hardware devices. With it you find what is available, reserve an item, and track where each
item went. It covers physical assets and virtual ones.

## Inventory entity

Inventory in the API represents:

- **Resource management**: Physical and virtual telecommunications assets including phone numbers and SIM cards
- **Availability tracking**: Real-time inventory levels and resource availability status
- **Reservation system**: Temporary holds on inventory items during order processing
- **Allocation control**: Assignment of resources to specific customers and subscriptions

## Key capabilities

- **Resource availability** — Check real-time availability of phone numbers, SIM cards, and hardware devices.
- **Inventory reservation** — Reserve inventory items temporarily during order configuration and checkout processes.
- **Asset allocation** — Assign telecommunications resources to specific customers and service subscriptions.
- **Stock management** — Track inventory levels, replenishment needs, and resource utilization metrics.

## Common use cases

- **Number selection** — Browse and select available phone numbers during service activation workflows.
- **SIM provisioning** — Check SIM card availability and allocate cards for new service activations.
- **Hardware fulfillment** — Manage device inventory for customer equipment orders and replacement programs.
- **Resource planning** — Monitor inventory levels and plan resource procurement based on demand forecasting.

## Related resources

Inventory entities integrate with other API resources:

- **Orders**: Inventory allocation during order configuration and fulfillment
- **Subscriptions**: Resource assignment to active telecommunications services
- **Product offerings**: Available inventory determines product offering availability
- **Customers**: Customer-specific inventory assignments and service resources
- **Licenses**: Software licenses and digital resource allocation

## Next steps

- [Lease phone numbers](/api-reference/inventory.md#tag/inventory/POST/inventory/lease-numbers) — Reserve phone numbers for service activation