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IMSI (International Mobile Subscriber Identity)

An international mobile subscriber identity (IMSI) is a unique number of up to 15 digits allocated to each GSM connection, which is a digital mobile network used by mobile phones. An IMSI contains: - The country code for the location of the GSM connection - The operator code associated with the network managing the connection - The mobile device number assigned to the connection The International Telecommunication Union (ITU) standardizes IMSIs.

What Small and Midsize Businesses Need to Know About IMSI (International Mobile Subscriber Identity)

An SMB might use an IMSI when authenticating a SIM card on its cellular network.

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