Verizon Fios, also marketed as Fios by Verizon, is a bundled Internet access, telephone, and television service that operates over a fiber-optic communications network with over 5 million customers in nine U.S. states. The name, Fios, is an acronym for Fiber Optic Service. Service is offered in some areas of the United States by Verizon Communications, while Frontier Communications operates licensed FiOS services in former Verizon territories across six states, using nearly identical network infrastructure. Fios service began in 2005, and networked areas expanded through 2010, although some areas do not have service or cannot receive TV and phone service because of franchise agreements.
Verizon was one of the first major U.S. carriers to offer fiber to the home and received positive ratings from Consumer Reports among cable television and Internet service providers.