Telefonos de México, S.A.B. de C.V., commonly known as Telmex, stands as a prominent mobile network operator in Mexico, part of the North America & Caribbean region. Recognized within the telecom industry by its Mobile Country Code (MCC) of 334 and Mobile Network Code (MNC) of 66, Telmex plays a crucial role in connecting millions across the country. As a major player in the Mexican telecommunications landscape, Telmex offers a range of services, potentially including mobile voice, data, and other connectivity solutions. Its network infrastructure contributes significantly to the overall telecommunications capabilities within Mexico, competing with other major operators and helping to drive innovation in the sector. The presence of Telmex, identified by MCC 334 and MNC 66, signifies its operational footprint within Mexico's mobile network ecosystem. Understanding these codes is crucial for identifying and analyzing network performance, coverage, and roaming agreements. While specific service offerings and market share details can fluctuate, Telmex's historical significance and ongoing presence make it a key component of Mexico's telecommunications landscape. Comparing its services, coverage, and customer base against other prominent Mexican networks provides valuable insights into the competitive dynamics of the country's mobile market.