Windows Push Notification Service

This article needs to be updated. The reason given is: does the WNS still exist in/has it been changed for Windows 11?. Please help update this article to reflect recent events or newly available information. (March 2025)

Windows Push Notification Service

Overview of the WNS architecture.
Developer(s)	Microsoft
Target platform(s)	Windows Phone 8.1, Windows 8, Windows 8.1, Windows 10, Windows 10 Mobile
Programming language(s)	C#
Status	Active
License	Closed-source
Website	dev.windows.com/en-us

Windows Push Notification Service (commonly referred to as Windows Notification Service or WNS) is a notification service developed by Microsoft for all devices running Microsoft Windows platforms. It allows for developers to send push data ("toast" and "tile" updates) to Windows and Universal Windows Platform applications which implement the feature.^[1] Designed as a successor to the Microsoft Push Notification Service, it was first supported on Windows 8 and subsequently on Windows Phone 8.1 upon its release.^[2]