MCC / MNC Codes:
By having the MCC and MNC information, you can determine whether the subscriber has ported their number to a different network compared with the operator prefix of the number. A Mobile Network Code (MNC) is used in combination with a Mobile Country Code (MCC) to uniquely identify a mobile phone operator/carrier.
IMSI
Some of our HLR Gateways can query the 15 digit IMSI (International Mobile Subscriber Identity number) of the mobile subscriber's phone number (MSISDN). The IMSI is a unique number which identifies the mobile subscribers in GSM and UMTS networks. Querying the IMSI provides subscriber information for authentication and authorization of the user in mobile security applications and scenarios, such as in online banking. The knowledge on IMSI number allows also enables certain Push to Talk (PTT) services.
MSC
MSC is short for Mobile Switching Centre and knowing the MSC information enables you to determine the approximate location of the mobile user.