---
title: addressInUse
framework: system
role: symbol
role_heading: Type Property
path: system/errno/addressinuse
---

# addressInUse

Address already in use.

## Declaration

```swift
static var addressInUse: Errno { get }
```

## Mentioned in

Adopting Swift Error Constants

## Discussion

Discussion Only one use of each address is normally permitted. The corresponding C error is EADDRINUSE.

## See Also

### Network Address Errors

- [addressFamilyNotSupported](system/errno/addressfamilynotsupported.md)
- [addressNotAvailable](system/errno/addressnotavailable.md)
- [addressRequired](system/errno/addressrequired.md)