What is a Mobile Network Code (MNC)?

Mobile Network Code (MNC) Explained

A Mobile Network Code (MNC) is a two or three-digit number that identifies a mobile network operator within a specific country. The MNC works in conjunction with the Mobile Country Code (MCC) to uniquely identify mobile network operators globally.

Purpose and Function

The primary purpose of MNCs is to distinguish between different mobile network operators within the same country. This identification enables:

• Network Selection: Helps mobile devices identify and select the correct network when multiple operators exist in a country.
• Routing: Ensures calls and data are routed to the correct operator's network.
• Operator Identification: Provides a standardized way to refer to specific mobile operators in technical and business contexts.

MNC Allocation

MNCs are typically assigned by national telecommunications regulatory authorities within each country. The length of the MNC can be either two or three digits, depending on the country's standards:

• In most countries, MNCs are two digits (00-99)
• In North America and some other regions, MNCs are three digits (000-999)

Examples of MNC assignments:

• AT&T in the US: MNC 410 (with MCC 310)
• Vodafone in the UK: MNC 15 (with MCC 234)
• NTT Docomo in Japan: MNC 10 (with MCC 440)

MNC in Network Identification

The combination of MCC and MNC forms the Public Land Mobile Network (PLMN) identity, which uniquely identifies a mobile network operator internationally:

PLMN = MCC + MNC

For example, the PLMN for AT&T in the US would be 310410.

Technical Implementation

The MNC is stored on the SIM card along with the MCC. When a mobile device searches for networks, it uses the MCC+MNC combination to identify preferred networks based on the prioritized list stored on the SIM. This is particularly important for roaming scenarios, where the device needs to select partner networks according to the home operator's preferences.

Business Implications

MNCs play a significant role in mobile telecommunications business operations:

• Roaming Agreements: Operators identify each other using MCC+MNC combinations when establishing roaming partnerships.
• Interconnection: MNCs are used in interconnection agreements between operators.
• Network Sharing: In network sharing arrangements, MNCs help distinguish between operators sharing the same physical infrastructure.

Regulatory Considerations

The assignment and management of MNCs involve regulatory oversight to ensure:

• Fair allocation of these limited resources
• Prevention of conflicts between operators
• Compliance with international standards
• Support for market competition