PT Pasifik Satelit Nusantara (PSN) is an Indonesian satellite communication company. It was formed in 1991 and was the first satellite-based telecommunications company in Indonesia. In 1995, a collaboration started what was to become ACES (Asia Cellular Satellite system). In 1998, a WAN-based service for corporate customers was introduced. In 1996, it became the first Indonesian company to be listed on the Nasdaq stock exchange.