Home Location Register

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The Home Location Register ( HLR ; German: Heimatortsregister ) is a (distributed) database and a central component of a cellular network . It is considered the home register of a mobile phone number , with each mobile station registered within a network and its associated mobile phone number being stored in the database. The mapping of each number to a visitor location register makes it possible, for example, to locate a mobile station within the network.

A failure of the HLR means that it is no longer possible to assign the respective participants. For a passively logged-in (inactive) device, the failure is initially not visible, it even supposedly remains logged into the network (via the VLR) - however, no more connections can be established and it can no longer be reached for incoming calls.

Filed data

The following data is stored in the HLR:

See also