EX-8.1 4 dex81.htm LIST OF SUBSIDIARIES OF TELEFONOS DE MEXICO, S.A.B. DE C.V.

Exhibit 8.1

Significant Subsidiaries and Investees

The following table sets forth our significant subsidiaries and investees accounted for using the equity method at December 31, 2009:

Name of Company |  | Jurisdiction of establishment |  | Percentage of ownership and voting interest |  |  | Description
Subsidiaries |  |  |  |  |  |  |
Integración de Servicios TMX, S.A. de C.V. |  | Mexico |  | 100.0 | % |  | Intermediate holding company.
Alquiladora de Casas, S.A. de C.V. |  | Mexico |  | 100.0 | % |  | Real estate company owning our facilities.
Compañía de Teléfonos y Bienes Raíces, S.A. de C.V. |  | Mexico |  | 100.0 | % |  | Real estate company owning our facilities.
Consorcio Red Uno, S.A. de C.V. |  | Mexico |  | 100.0 | % |  | Supplier of telecommunications network integration services and information systems.
Teléfonos del Noroeste, S.A. de C.V. |  | Mexico |  | 100.0 | % |  | Fixed-line public network concessionaire for the state of Baja California Norte and the San Luis Rio Colorado region of the state of Sonora.
Uninet, S.A. de C.V. |  | Mexico |  | 100.0 | % |  | Provider of corporate networks and Internet access services to Telmex and corporate customers.
Telmex USA, L.L.C. |  | Delaware |  | 100.0 | % |  | Authorized long distance service re-seller, provider of prepaid telephone cards and payment collection services for lines in Mexico (installation and monthly rental), and authorized by the FCC to provide facility-based long distance services, data transmission and cross-border data transit services.
Affiliated companies |  |  |  |  |  |  |
Grupo Telvista S.A. de C.V. |  | Mexico |  | 45.0 | % |  | Provider of telemarketing services in the United States and Mexico.
2Wire, Inc. |  | California |  | 13.0 | % |  | Broadband network equipment and service provider for residential and small-business customers.