What is msisdn?

The Mobile Station International Subscriber Directory Number (MSISDN) is a globally unique identifier for a mobile phone subscription. It is composed of a country code, a network code, and a unique subscriber number. The MSISDN is used to route calls and text messages to a specific mobile subscriber. It also allows for mobile operators to identify and track individual subscribers on their networks. The MSISDN is typically displayed in the format: +Country Code Network Code Subscriber Number.