Nippon Telegraph and Telephone Corporation, together with its subsidiaries, provides fixed and mobile voice related services, IP/packet communications services, telecommunications equipment, and system integration and other telecommunications-related services in Japan and internationally. It operates through five segments: Regional Communications Business, Long Distance and International Communications Business, Mobile Communications Business, Data Communications Business, and Other Business. The company offers regional communications services, including intra-prefectural communications and related ancillary services; long distance and international communications services, such as inter-prefectural communications, international communications, solution business, and related services; mobile communications services, including mobile phone services and related services; and data communications services, such as system integration, network system services, etc. It also provides financial services, such as issuing leases and credit cards; real estate services, including building rentals and apartment sales; systems development services; and construction-related services, such as the design, construction, and maintenance of buildings. In addition, the company engages in strategic planning, designing, installing, and operating data communications systems and computer network-based information systems, as well as providing IT services. As of March 31, 2015, it had 18,716 thousand FTTH service subscriptions; 1,219 thousand ADSL service subscriptions; 24,344 thousand fixed-line telephone service and ISDN service subscriptions; 11,586 thousand ISP service subscriptions; and 66,595 thousand mobile broadband and voice communications subscribers. The company was founded in 1952 and is headquartered in Tokyo, Japan.