MNC

The Mobile Network Code, or MNC, is a two- or three-digit number that identifies a specific mobile network operator within a given country. It works alongside the Mobile Country Code (MCC) to form a unique identifier that distinguishes every operator worldwide. Together, the MCC and MNC make up the first part of the International Mobile Subscriber Identity (IMSI), ensuring that every subscriber can be correctly routed and authenticated.

When a device connects to a network, the MNC signals which carrier the subscriber is associated with. For example, in the United States (MCC 310–316), different MNCs identify networks such as AT&T, T-Mobile, or Verizon. This distinction is crucial for accurate call routing, roaming management, and billing across global mobile networks.

The MNC gives precision to subscriber identification by narrowing down the carrier within the MCC’s country code. This ensures seamless authentication and reliable service both domestically and internationally.