Mobile Station International Subscriber Directory Number


Mobile Station International Subscriber Directory Number (MSISDN) is a unique identifier used in mobile networks to represent a mobile phone user. It consists of a country code, national destination code, and a subscriber number, which together globally distinguish a specific mobile user. Essentially, the MSISDN serves as the phone number that allows calls and text messages to be correctly routed to a mobile device.

Key Takeaways

  1. Mobile Station International Subscriber Directory Number (MSISDN) is a unique identification assigned to mobile phone users globally, commonly known as a mobile phone number.
  2. MSISDN consists of a country code, national destination code, and a subscriber number, enabling seamless network communication and facilitating tracking and billing procedures for mobile operators.
  3. In addition to voice and SMS services, MSISDN enables various applications such as caller identity, number portability, and mobile number verification for security purposes.


The Mobile Station International Subscriber Directory Number (MSISDN) is an important technology term in the telecommunications industry as it uniquely identifies a mobile user in the global context.

It serves as the primary key for various network services and billing processes.

Comprising a country code, national destination code, and a subscriber number, MSISDN enables efficient routing of calls and messages to the correct destination, ensuring seamless communication across international borders.

Given the widespread use of mobile devices, the MSISDN’s role in maintaining effective communication between users worldwide is crucial, making it an essential component of modern telecommunication systems.


The Mobile Station International Subscriber Directory Number (MSISDN) is a crucial element in the telecommunication industry, as it enables seamless connection, identification, and accessibility among mobile phone users around the world. The primary purpose of the MSISDN is to serve as a unique identifier for each mobile subscriber, facilitating communication across various cellular networks.

This number is composed of the country code, national destination code, and a subscriber mobile number, integrating the user’s location and network details to ensure efficient routing of calls and messages across borders and carriers. As a result, mobile service providers and telecommunication systems can effectively swap data, optimize network services, and deliver accurate call billing while maintaining a user-friendly calling experience.

Furthermore, the MSISDN proves invaluable in providing location-based services and content targeting, as it grants service providers the ability to deliver customized promotions and offerings based on the user’s region and preferences. By analyzing and catering to an individual’s location-specific requirements, businesses can enhance customer satisfaction and retention, ultimately resulting in increased profitability.

Moreover, MSISDNS can be instrumental in implementing security features like two-factor authentication, which plays a pivotal role in protecting users from fraud and unauthorized access to their accounts. In essence, the Mobile Station International Subscriber Directory Number not only streamlines global communication but also fosters targeted services and robust security measures tailored to users’ needs.

Examples of Mobile Station International Subscriber Directory Number

The Mobile Station International Subscriber Directory Number (MSISDN) is a unique number used to identify a mobile phone user, usually represented as a string of 15 digits in the form: CC + NDC + SN, where CC = Country Code, NDC = National Destination Code, and SN = Subscriber Number.Here are three real-world examples of MSISDN:

Online Food Delivery: When a user orders food through a mobile app, the MSISDN is sent to the restaurant along with the order details. The restaurant can then use this MSISDN to call or message the user if they have any questions or updates about the order. Additionally, the app provider can use the MSISDN to store the user’s order history for personalized recommendations and easy re-ordering.

Mobile Banking: Financial institutions or payment services require users to link their MSISDN to their accounts for secure transactions. For instance, when users attempt to make a payment or access financial information, the bank sends a One Time Password (OTP) to the registered MSISDN as a part of the multi-factor authentication process.

Emergency Services: In case of an emergency, when a user dials a specific emergency number from their mobile phone, the MSISDN can be used by emergency service providers to identify and locate the caller. This information can be critical to providing assistance in a timely manner, especially during life-threatening situations.

FAQs – Mobile Station International Subscriber Directory Number

What is Mobile Station International Subscriber Directory Number (MSISDN)?

MSISDN is a unique identifier for a mobile device user. It is their telephone number associated with the Subscriber Identity Module (SIM) card in their mobile device. The telephone number is formatted according to the E.164 numbering plan standard.

What is the structure of an MSISDN?

MSISDN has three main parts: Country Code (CC), National Destination Code (NDC), and Subscriber Number (SN). The CC identifies the country, the NDC identifies the network operator, and the SN is the actual telephone number associated with the subscriber.

What is the purpose of MSISDN?

MSISDN serves as an identification number for a mobile subscriber which allows them to make and receive calls, send and receive messages, and access various telecommunication services. Additionally, it allows service providers and network operators to effectively manage and route calls to the appropriate devices.

Is MSISDN the same as IMSI?

No, MSISDN and IMSI (International Mobile Subscriber Identity) are not the same. MSISDN is the telephone number associated with a mobile subscriber, whereas IMSI is a unique identifier associated with the SIM card itself. The MSISDN can be changed by acquiring a new SIM card, while the IMSI stays the same.

How can I find the MSISDN on my mobile phone?

You can typically find the MSISDN of your mobile device by checking the Settings menu under the Phone or About sections. Alternatively, you can dial *#100# on some networks to display your MSISDN on the screen. You can also contact your network operator to obtain your MSISDN.

Related Technology Terms

  • IMSI: International Mobile Subscriber Identity
  • MSISDN: Mobile Station International Subscriber Directory Number
  • SIM: Subscriber Identity Module
  • IMEI: International Mobile Equipment Identity
  • HLR: Home Location Register

Sources for More Information

  • GSMA: A trade association representing mobile network operators globally, offering valuable resources and insights into Mobile Station International Subscriber Directory Number and related topics.
  • ITU: The International Telecommunication Union, a specialized agency of the United Nations responsible for all matters related to information and communication technologies, including mobile stations and directory numbers.
  • ETSI: The European Telecommunications Standards Institute, an organization that produces globally applicable standards for information and communications technologies, including telecommunications.
  • 3GPP: The 3rd Generation Partnership Project, a collaboration between groups of telecommunications standards associations that develops protocols for mobile telecommunications.

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