Disclosed are network-based device, method and computer readable medium associated with an IP Multimedia Subsystem for providing registration alerts in the IMS system. The method embodiment includes detecting a predetermined event associated with a registration state associated with all of a user's registrations in the IMS and transmitting a notification to a user which reports the occurrence of the predetermined event. The method may also include taking an action relative to the user's registration state in the IMS system based on the user interaction with the notification.