International Mobile Station Identity (IMSI)
Definition: The International Mobile Station Identity (IMSI) is a decimal number used to uniquely identify personal mobile stations. In some cases, ambiguity might arise when using only the 10-digit MIN. The IMSI has up to 15 decimal digits (0-9). The first three (most significant) decimal numbers of the IMSI are the Mobile Country Code (MCC). The remaining digits are the National Mobile Station Identity (NMSI). The IMSI and how to map the decimal number into a binary number are discussed in Standards Proposal No. 3384, which if approved, will be published as J-STD-008.
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