MSISDN Mobile Station ISDN number
Mobile Station ISDN Number (MSISDN) is a unique identifier used to identify a mobile phone number on a mobile network. MSISDN is composed of several elements that identify a mobile device's location, network operator, and user's number.
In this article, we will explain what an MSISDN number is, how it works, what it's composed of, and how it's used in mobile networks.
What is an MSISDN?
An MSISDN is a unique identifier assigned to a mobile phone number that is used to identify and route calls and messages on mobile networks. It's a 15-digit number that's composed of a country code, network code, and user number.
The MSISDN is stored on the SIM card in the mobile device and is used by the network to route calls and messages to the correct mobile device. It's also used by mobile operators to identify and track the usage of mobile devices on their network.
How does MSISDN work?
When a call is made to a mobile device, the calling party's device sends a request to the mobile network to establish a connection with the called party's device. The mobile network uses the MSISDN to identify the called party's device and route the call to the correct mobile device.
The MSISDN is also used to identify the location of the mobile device on the mobile network. When a mobile device is turned on, it sends a signal to the network indicating its location. The network uses the MSISDN to identify the location of the mobile device and route calls and messages to it.
What is MSISDN composed of?
An MSISDN is composed of three elements: country code, network code, and user number.
Country code: The first three digits of the MSISDN represent the country code. The country code is used to identify the country where the mobile device is registered.
Network code: The next two or three digits of the MSISDN represent the network code. The network code is used to identify the mobile network operator that provides service to the mobile device.
User number: The remaining digits of the MSISDN represent the user number. The user number is a unique number assigned by the network operator to identify the mobile device on its network.
For example, a mobile device registered in the United States on the AT&T network may have an MSISDN of +1 310 555 1212. In this example, the country code is +1, the network code is 310, and the user number is 5551212.
How is MSISDN used in mobile networks?
MSISDN is used by mobile networks to identify and route calls and messages to the correct mobile device. When a call or message is sent to a mobile device, the network uses the MSISDN to identify the location of the mobile device and route the call or message to it.
Mobile operators also use MSISDN to track the usage of mobile devices on their network. They can use MSISDN to identify the type of device being used, the mobile network operator providing service, and the location of the device.
MSISDN is also used by mobile operators to provide location-based services to mobile device users. By using the MSISDN, mobile operators can identify the location of the mobile device and provide services such as location-based advertising, emergency services, and location-based promotions.
Conclusion
MSISDN is a unique identifier used to identify a mobile phone number on a mobile network. It's composed of a country code, network code, and user number. MSISDN is used by mobile networks to identify and route calls and messages to the correct mobile device and to track the usage of mobile devices on their network. It's also used by mobile operators to provide location-based services to mobile device users. In addition to its core functions of identifying and routing calls and messages, the MSISDN is also used for various other purposes. For example, it can be used by mobile operators to identify subscribers who are using roaming services on their network. When a subscriber travels to a foreign country and uses their mobile device, their device is identified by the MSISDN, and the operator can then apply roaming charges to the subscriber's account.