Exhibit 8.1

List of Certain Subsidiaries of América Móvil, S.A.B. de C.V.

As of March 31, 2014

Name of Company	Jurisdiction	Ownership Interest(1)		Main Activity
AMX Tenedora, S.A. de C.V.	Mexico		100.0	Holding Company
Compañía Dominicana de Teléfonos, S. A. (Codetel)	Dominican Republic		100.0	Fixed-line/ Wireless
Sercotel, S.A. de C.V.	Mexico		100.0	Holding Company
Radiomovil Dipsa, S.A. de C.V. and subsidiaries (Telcel)	Mexico		100.0	Wireless
Puerto Rico Telephone Company, Inc.	Puerto Rico		100.0	Fixed-line/ Wireless
Servicios de Comunicaciones de Honduras, S.A. de C.V. (Sercom Honduras)	Honduras		100.0	Wireless
TracFone Wireless, Inc.	USA		98.2	Wireless
Claro Telecom Participacões, S.A.	Brazil		100.0	Holding
Claro S.A.	Brazil		100.0	Wireless
Americel S.A.	Brazil		100.0	Wireless
Telecomunicaciones de Guatemala, S.A.	Guatemala		99.3	Fixed-line/ Wireless
Empresa Nicaragüense de Telecomunicaciones, S.A. (Enitel)	Nicaragua		99.6	Fixed-line/ Wireless
Cablenet, S.A.	Nicaragua		100.0	Cable TV
Estaciones Terrenas de Satélite, S.A. (Estesa)	Nicaragua		100.0	Cable TV
Compañía de Telecomunicaciones de El Salvador (CTE), S.A. de C.V.	El Salvador		95.8	Fixed-line
Cablenet, S.A. (Cablenet)	Guatemala		95.8	Fixed-line
Telecomoda, S.A. de C.V. (Telecomoda)	El Salvador		95.8	Directories Provider
CTE Telecom Personal, S.A. de C.V.	El Salvador		95.8	Wireless
Comunicación Celular S.A. (Comcel)	Colombia		99.4	Wireless
Telmex Colombia, S.A.	Colombia		99.3	Fixed-line/ Cable TV
Consorcio Ecuatoriano de Telecomunicaciones, S.A. (Conecel).	Ecuador		100.0	Wireless
AMX Argentina, S.A.	Argentina		100.0	Wireless
Telmex Argentina, S.A.	Argentina		99.6	Services to Corporate Customers
Telstar, S.A.	Uruguay		99.9	Fixed-line
Flimay, S.A.	Uruguay		99.9	DTH
AMX Paraguay, S.A.	Paraguay		100.0	Wireless
AM Wireless Uruguay, S.A.	Uruguay		100.0	Wireless
Claro Chile S.A.	Chile		100.0	Wireless
Claro Servicios Empresariales, S.A.	Chile		99.4	Fixed-line/ Wireless
América Móvil Perú, S.A.	Peru		100.0	Wireless
Claro Panamá, S.A.	Panama		100.0	Wireless
Carso Telecom B.V. (formerly known as Amov Europa B.V.)	Netherlands		100.0	Holding Company
Teléfonos de México, S.A.B. de C.V.	Mexico		97.7	Fixed-line
Integración de Servicios TMX, S.A. de C.V.	Mexico		97.7	Holding Company
Consorcio Red Uno, S.A. de C.V.	Mexico		97.7	Telecommunications Network Integration Services
Teléfonos del Noroeste, S.A. de C.V.	Mexico		97.7	Fixed-line
Uninet, S.A. de C.V.	Mexico		97.7	Corporate networks and internet Access Services
Telmex USA, L.L.C.	USA		97.7	Fixed-line

Name of Company	Jurisdiction	Ownership Interest(1)	Main Activity
Empresa de Servicios y Soporte Integral GC, S.A.P.I. de C.V..	Mexico	97.7	Holding Company
Alquiladora de Casas, S.A. de C.V.	México	97.7	Real Estate
Compañía de Teléfonos y Bienes Raíces, S.A. de C.V.	México	97.7	Real Estate
Renta de Equipo, S.A. de C.V.	México	97.7	Leasing
Telmex Internacional, S.A. de C.V.	Mexico	97.8	Holding Company
Ecuador Telecom, S.A.	Ecuador	97.8	Fixed-line
Empresa Brasileira de Telecomunicacões, S.A. (Embratel)	Brazil	95.7	Fixed-line
Star One, S.A.	Brazil	95.7	Provider of Satellite Services
Net Serviços de Comunicação, S.A.	Brazil	92.2	Cable TV
Ertach, S.A.	Argentina	99.5	Wireless
Claro Comunicaciones, S.A.	Chile	97.5	Fixed-line/ Wireless
Páginas Telmex Colombia, S.A.	Colombia	97.8	Directories Provider
Sección Amarilla USA, LLC	USA	97.8	Directories Provider
Publicidad y Contenido Editorial, S.A. de C.V.	Mexico	97.8	Provider of Cable Television Content
Editorial Contenido, S.A. de C.V.	Mexico	97.8	Magazine Editor

(1) Percentage of equity owned by América Móvil, S.A.B. de C.V. directly or indirectly through its subsidiaries and/or affiliates.