How long is imsi

A mobile operator is free to choose a unique MSIN. For security reasons, the radio network uses TMSI, as the temporary identity of the sim card over the radio interface.

When a person buys a sim card. It comes with an IMSI or unique identity, which belongs to the network operator of the sim card. Most of the time, this does not change. But there are sim cards, having multiple IMSIs configured. Depends on the location, the identity changes. This reduces roaming changes.

But they are different identities. Save my name, email, and website in this browser for the next time I comment. It is of a fixed length of three digits, E. The MNC can be 2 or 3 digits long. IMSI vs. IMEI is the 14 Digits long field, while the other is 15 digits long. SIM cards come with a validity time. Forgotten Password. The IMSI is a unique number identifying a subscriber. The first 3 digits represent the mobile country code MCC , which is followed by the mobile network code MNC , either 2-digit European standard or 3-digit North American standard.

The remaining digits are the mobile subscription identification number MSIN within the network's customer base, usually 9 to 10 digits long, depending on the length of the MNC. Sign Up Create a login to use Melrose Labs services. First name First name. Last name Last name. Organisation name Organisation name. Email address Enter your email address.