Visitor Location Register (VLR)

The Visitor Location Register (VLR) contains information about the mobile stations roaming in a Mobile Switching Center (MSC) area. It is also possible that one VLR handles the visitor register of several MSC areas. A VLR contains information from all active subscribers in its area, even from those to whom the network is their home network, so the name VLR is misleading as most entries in the register are not visitors, but users in their own home network.

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