REGION XII, or SOCCSKSARGEN is a region of the Philippines, located in South Central Mindanao, and is officially designated as Region XII. The name is an acronym that stands for the region's four provinces and one of its cities: South Cotabato, Cotabato, Sultan Kudarat, Sarangani and General Santos City. The region is more formally known by its older name Central Mindanao. The regional center is Koronadal City located in the province of South Cotabato. Cotabato City, though geographically within the boundaries of the province of Maguindanao, itself is part of SOCCSKSARGEN, and is independent of that province. Maguindanao province is, in fact, a part of the Autonomous Region in Muslim Mindanao (ARMM) which has its seat in Cotabato City. SOCCSKSARGEN and the province of Maguindanao were once part of the original Cotabato province.