Subscription Permanent Identifier (SUPI)

A unique identification associated with all 5G network SIM cards. It is stored as a 64 bit field and is sent by the phone to the network. The SUPI is used in any mobile network that interconnects with other networks and the value is typically a 15-digit number. The first three digits represent the Mobile Country Code (MCC) and the next two or three are the Mobile Network Code (MNC) identifying the network operator. The remaining digits are the Mobile Subscriber Identification Number (MSIN) and represent the individual user of that particular operator.