Telmex is a Mexican telecommunications company headquartered in Mexico City that provides telecommunications products and services in Mexico,. Telmex is still the dominant fixed-line phone carrier in Mexico. In addition to traditional fixed-line telephone service, Telmex offers Internet access through their brand of Wi-Fi networks, data, hosted services and IT services. Telmex owns 90 percent of the telephone lines in Mexico City and 80 percent of the lines in the country. Telmex is a wholly owned subsidiary of América Móvil.