ADIF

Administrador de Infraestructuras Ferroviarias (ADIF), operating within Spain, Europe, is a unique mobile network primarily dedicated to supporting railway infrastructure and operations. Identified by the Mobile Country Code (MCC) 214, signifying Spain, and the Mobile Network Code (MNC) 51, ADIF's network isn’t typically used for public mobile services like Vodafone Spain (MCC 214, MNC 01) or Telefonica Movistar (MCC 214, MNC 07). Instead, it fulfills critical communication needs for railway personnel, signaling systems, and potentially even passenger information systems on high-speed rail lines like the AVE. The deployment of a dedicated mobile network allows ADIF to maintain secure and reliable communication independent of the public cellular infrastructure. This is vital for ensuring the safety and efficiency of train operations across Spain's extensive railway network. While details on ADIF's specific technologies are often proprietary, it's likely the network utilizes specialized frequencies and protocols tailored for Railway communication, perhaps including GSM-R (Global System for Mobile Communications – Railway). This contrasts with other Spanish mobile operators focusing on 4G and 5G deployments for consumer and business use. Therefore, understanding ADIF in the context of MCC and MNC involves appreciating its specialized role within the wider Spanish telecommunications landscape.