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# SCNetworkReachabilityCallBack

Type of callback function used when the reachability of a network address or name changes.

```
typealias SCNetworkReachabilityCallBack = (SCNetworkReachability, SCNetworkReachabilityFlags, UnsafeMutableRawPointer?) -> Void
```

## Parameters

`target`

The network target being monitored for changes.

`flags`

The flags representing the reachability status of the network address or name (see [`SCNetworkReachabilityFlags`](/documentation/SystemConfiguration/SCNetworkReachabilityFlags) for information about these flags).

`info`

A C pointer to a user-specified block of data.

## Discussion

---

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