Hrvatski Telekom DD engages in providing telecommunication services. It also offers fixed and mobile telephony services as well as wholesale, internet and data services. It operates through the following business segments: Private, Business, Network and Functions Support, Optima Telekom, and Crnogorski Telekom. The Private segment includes marketing, sales, and customer service which provides mobile services and fixed telecommunications and television distribution services to private users. The Business segment consists of marketing, sales and customer services for corporate users, small and medium-sized enterprises. The Network and Support Functions Support segment conducts technology, procurement, accounting, treasury, legal affairs, and other central functions. The company was founded on December 28, 1998 and is headquartered in Zagreb, Croatia.