---
title: index
framework: network
role: symbol
role_heading: Instance Property
path: network/nwinterface/index
---

# index

The system interface index associated with the interface.

## Declaration

```swift
var index: Int { get }
```

## See Also

### Inspecting Interfaces

- [type](network/nwinterface/type.md)
- [NWInterface.InterfaceType](network/nwinterface/interfacetype.md)
- [name](network/nwinterface/name.md)