> ## Documentation Index
> Fetch the complete documentation index at: https://docs.payvessel.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List Regions

> List all supported eSIM regions and countries

Retrieve all supported regions from the eSIM provider. Regions can be countries or broader areas (e.g. "Europe", "Asia") and may contain nested sub-locations.

## Usage

```bash theme={null}
curl https://api.payvessel.com/vaas/api/v1/esim/regions \
  -H "api-key: YOUR_API_KEY" \
  -H "api-secret: YOUR_SECRET_KEY"
```

## Response fields

Each region includes:

| Field           | Type            | Description                                    |
| --------------- | --------------- | ---------------------------------------------- |
| `code`          | string          | Region/country code (e.g. `US`, `EU`)          |
| `name`          | string          | Display name (e.g. "United States", "Europe")  |
| `region_type`   | integer or null | Type identifier for the region                 |
| `sub_locations` | array           | Nested sub-regions (same structure, recursive) |

Use the `code` value as the `location_code` filter when [listing packages](/esim/list-packages).

<Card title="API Reference" icon="code" href="/api-reference/esim/list-regions">
  Full request/response details and Try it
</Card>