Cincinnati Bell, doing business as Altafiber (typeset as altafiber), is a regional telecommunications service provider based in Cincinnati, Ohio, United States. It provides landline telephone, fiber-optic Internet, and IPTV services through its subsidiaries Cincinnati Bell Telephone and Hawaiian Telcom, which are the incumbent local exchange carriers for the Greater Cincinnati metropolitan area (aka "The Tri-State") and Hawaii. Other subsidiaries provide enterprise information technology services and long distance calling.