Bell Canada (commonly referred to as Bell) is a Canadian telecommunications and media company headquartered in Montreal, Quebec. Its subsidiaries include Bell Aliant, Northwestel, Télébec, and NorthernTel, it is the incumbent local exchange carrier for telephone and DSL Internet services in most of Canada east of Manitoba and in the northern territories, and a major competitive local exchange carrier for enterprise customers in the western provinces. Its subsidiary Bell Mobility (including Solo Mobile and Virgin Mobile Canada) is one of Canada's "big three" mobile telecommunications providers, while Bell TV provides direct-to-home satellite TV service. Bell Canada's principal competition is Rogers Communications in a majority of its service territory. The company serves over 13 million phone lines and is headquartered at the Campus Bell complex in Montreal.