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VLR - Visitor Location Register

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VLR - Visitor Location Register contains the international mobile subscriber identity (IMSI) and the MSISDN of which helps to interpret the location of the mobile subscriber.

The main difference between VLR and typical HLR is that the data changes more often, due to the roaming nature of the look up request.

VLR is often referred to as 'roaming' or 'foreign HLR'.

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