# CFNetServiceGetAddressing(_:) Gets the IP addressing from a CFNetService. ``` func CFNetServiceGetAddressing(_ theService: CFNetService) -> Unmanaged? ``` ## Parameters `theService` The CFNetService whose IP addressing is to be obtained; cannot be `NULL`. ## Return Value A CFArray containing a CFDataRef for each IP address returned, or `NULL`. Each CFDataRef consists of a `sockaddr` structure containing the IP address of the service. This function returns `NULL` if the service’s addressing is unknown because [`CFNetServiceResolve`](/documentation/CFNetwork/CFNetServiceResolve) has not been called for `theService`. ## Discussion This function gets the IP addressing from a CFNetService. Typically, the CFNetService was obtained by calling [`CFNetServiceBrowserSearchForServices(_:_:_:_:)`](/documentation/CFNetwork/CFNetServiceBrowserSearchForServices(_:_:_:_:)). Before calling this function, call [`CFNetServiceResolve`](/documentation/CFNetwork/CFNetServiceResolve) to update the CFNetService with its IP addressing. ### Special Considerations This function gets the data in a thread-safe way, but the data itself is not safe if the service is altered from another thread. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)