MO — Macau

Macau (Macao) is a Special Administrative Region of China on the western side of the Pearl River Delta, known as the 'Las Vegas of Asia' for its massive casino and gaming industry. Macau generates more gambling revenue than any other city in the world. As a former Portuguese colony, it operates under 'one country, two systems' like Hong Kong. The Macanese Pataca (MOP) is pegged to the Hong Kong Dollar. For developers, the MO country code maps to zh-MO for Chinese and pt-MO for Portuguese. The .mo domain and +853 calling code serve Macau. The spelling variation (Macau vs Macao — ISO uses MO for Macao) can cause data inconsistencies. Macau's Portuguese heritage creates a unique bilingual Chinese-Portuguese environment in Asia. The MOP's peg to HKD (rather than directly to USD or CNY) creates an indirect multi-currency relationship. Macau's gaming industry regulations make it an important jurisdiction in iGaming and fintech applications.