MX — Mexico

Mexico is a large North American country south of the United States, with coastlines on the Pacific, Gulf of Mexico, and Caribbean Sea. Mexico City, the capital, is one of the world's largest metropolitan areas with over 21 million people. Mexico has the largest number of Spanish speakers in the world and is a major manufacturing and tech hub. The Mexican Peso (MXN) is one of the most traded currencies globally. For developers, the MX country code maps to the es-MX locale — arguably the most important Spanish locale after es-ES, given Mexico's enormous population and digital market. The .mx domain is heavily used, and +52 is a critical dialing code. Mexico's CURP (Clave Única de Registro de Población) and RFC (Registro Federal de Contribuyentes) identification systems require specific validation algorithms. Mexican phone numbers transitioned to a 10-digit national format, affecting phone number validation. Mexico's proximity to the US and large tech industry make it one of the most important markets in Latin America.