What Is an IMSI Number?
There is a smartphone’s identifier called IMSI typically provisioned in the SIM card. A subscriber identity module or
subscriber identification module (SIM) is an integrated circuit that securely stores the international mobile subscriber
identity (IMSI) and the related key used to identify and authenticate subscribers on mobile telephony devices (such as
mobile phones and computers).These four letters IMSI stand for International Mobile Subscriber Identity. Here below
you will find out what is IMSI and how to decode it.
Each IMSI consists of three parts:
MSIN
MCC
MNC
The first part is called Mobile Subscriber Identification Number, and it gets no more than 10 decimal places. It
identifies the subscriber in his or her mobile network.
The second part is called Mobile Country Code. It gets 3 decimal places and identifies the country of mobile device
owner.
The third part stands for Mobile Network Code with 2 decimal places. It identifies your carrier network within the
country.
IMSI identifies registered smartphone users. A working SIM card has a valid IMSI. You can use it only with the
smartphone that has a valid IMSI/IMEI code.
You can identify country and mobile operator of the iPhone using only MCC and MNC of IMSI number. It is also called
operators code.