A technology for indicating and determining the availability of a multitude of application servers. The method comprises for each of application server a first step of inserting into an availability database a notification period defining an upper time limit for a repetition period of an availability signal, which is repeated as long as the application server is available. In a second step for each availability signal its corresponding time stamp is inserted as availability time into the availability database. The difference of the current time and a recent availability time compared to said notification period is representing a measure of availability for the application servers.