---
title: kABInstantMessageUsernameKey
framework: Address Book
role: symbol
role_heading: Global Variable
platforms: [macOS 10.7+]
path: addressbook/kabinstantmessageusernamekey
---

# kABInstantMessageUsernameKey

The instant messaging username or handle.

## Declaration

```swift
let kABInstantMessageUsernameKey: String
```

## See Also

### Constants

- [kABInstantMessageServiceKey](addressbook/kabinstantmessageservicekey.md)