MSISDN (/ ˈ ɛ m ɛ s aɪ ɛ s d iː ɛ n / MISS-den) is a number uniquely identifying a subscription in a Global System for Mobile communications or a Universal Mobile Telecommunications System mobile network. It is the mapping of the telephone number to the subscriber identity module in a mobile or cellular phone.

IMEI is a 15-digit number assigned to every cellular device for each of its SIM slots; IMSI is a 15-digit number assigned to the SIM of a mobile subscriber; ICCID is a number that identifies the chip of each SIM card; MSISDN is the full mobile number including the country code and any prefixes.

MSISDN is the abbreviation for Mobile Station International Subscriber Directory Number. However, this number is merely a label — something the user can remember and share. In mobile networks, the unique user identifier is, in fact, the SIM card identifier, also known as the International Mobile Subscriber Identity (IMSI) .

While IMSI and MSISDN are both important identifiers in mobile telecommunications, they serve different purposes and have distinct attributes. IMSI is primarily used for network authentication and identification, while MSISDN is used for making and receiving calls.

2024年5月5日 · MSISDN establishes communication between devices, while IMSI is used to authenticate and authorise subscribers to access mobile networks. So the primary difference is that MSISDN is associated with a phone number.

2025年3月6日 · What is MSISDN? The MSISDN is the globally unique phone number assigned to a mobile subscriber. While it’s primarily used for communication, it also serves as an essential identifier for routing calls and messages through telecom networks.

A mobile subscriber integrated services digital network (MSISDN) number is a cellphone's phone number. The IMSI is used internally within cellphone systems to identify a phone. An international mobile subscriber identity (IMSI) number uniquely identifies a cellphone subscriber.