What is mdn number?

MDN number, also known as mobile directory number or mobile subscriber number, is a unique identification number assigned to a mobile device in a cellular network. It is used to route calls and text messages to a specific mobile device and is essential for network operators to manage and track mobile communications.

The MDN number is different from the IMEI (International Mobile Equipment Identity) number, which is a unique identifier for the mobile device itself. The MDN number is usually assigned by the network operator when a subscriber activates a new mobile phone or SIM card.

MDN numbers can be ported between different network operators when a subscriber changes service providers while keeping the same phone number. This process is known as mobile number portability.

MDN numbers are typically 10 digits long and may vary in format depending on the country and the specific network operator. They are essential for the proper functioning of mobile communication services and play a crucial role in maintaining network connections and ensuring reliable communication between mobile devices.