# CFNetServiceGetTXTData(_:) Queries a network service for the contents of its TXT records. ``` func CFNetServiceGetTXTData(_ theService: CFNetService) -> Unmanaged? ``` ## Parameters `theService` Reference for the network service whose TXT record data is to be obtained; cannot be `NULL`. Note that in order to get TXT record data, you must resolve `theService` by calling [`CFNetServiceResolve`](/documentation/CFNetwork/CFNetServiceResolve) or [`CFNetServiceResolveWithTimeout(_:_:_:)`](/documentation/CFNetwork/CFNetServiceResolveWithTimeout(_:_:_:)) before calling this function. ## Return Value CFDataRef object containing the requested TXT data and suitable for passing to [`CFNetServiceCreateDictionaryWithTXTData(_:_:)`](/documentation/CFNetwork/CFNetServiceCreateDictionaryWithTXTData(_:_:)), or `NULL` if the service’s TXT data has not been resolved. ## Discussion This function gets the data from the service’s TXT records. ### 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)