Level 3 Communications is an international communications and information services company. The organization s headquarters is located in Chicago. Level 3 operates one of the largest communications and Internet backbones in the world. The company is also one of the largest providers of wholesale dial-up service to Internet service providers in North America, and is the primary provider of Internet connectivity for millions of broadband subscribers through its cable and digital subscriber line partners. Level 3 offers a wide range of communications services throughout its approximately 23,000-mile broadband fiber optic network, which includes Internet protocol services, broadband transport, collocation services, and managed modem and voice services.