Tuesday 14 June 2016

What is IMSI

International Mobile Subscriber Identity (IMSI)



The IMSI is a unique identity allocated to each subscriber. It is
used for correct identification over the radio path and
through GSM PLMN network. All network-related subscriber
information is connected to the IMSI. The IMSI is stored in the
SIM, in the HLR and VLR.

The IMSI consists of three parts:

IMSI = MCC+MNC+MSIN

Where,

MCC=Mobile Country Code
MNC=Mobile Network Code
MISN=Mobile Station Identification Code

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