Private company

Telmex

Logo: Telmex, Public domain, via Wikimedia Commons3

Mexican telecommunications company

Teléfonos de México, S.A.B. de C.V., known as Telmex is a Mexican telecommunications company headquartered in Mexico City that provides telecommunications products and services in Mexico. In 2014, Telmex was the dominant fixed-line phone carrier in Mexico. In addition to traditional fixed-line telephone service, Telmex offers Internet access through their Infinitum brand of Wi-Fi networks, data, hosted services and IT services.2 Its chief executive is Carlos Slim.1 It is part of América Móvil.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

1947Founded1
  • Industrytelecommunications industry1
  • HeadquartersMexico City1
  • Websitetelmex.com
  • Legal formjoint-stock company1

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Telmexstore
Photo: Photographed by user Coolcaesar on November 2 , 2005 ., CC BY-SA 3.0, via Wikimedia Commons5

Teléfonos de México, S.A.B. de C.V., known as Telmex is a Mexican telecommunications company headquartered in Mexico City that provides telecommunications products and services in Mexico. In 2014, Telmex was the dominant fixed-line phone carrier in Mexico. In addition to traditional fixed-line telephone service, Telmex offers Internet access through their Infinitum 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.2

Corporate structure

Telmex is part of a group headed by América Móvil. 36 entities, 17 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

The story

Telmex was founded in Mexico the January 1, 1947 (1947-01-01), when a group of Mexican investors bought Swedish Ericsson's Mexican branch. In 1950, the same investors bought the Mexican branch of the ITT Corporation, thus becoming the only telephone provider in the country. In 1972, the Mexican government bought the company.

In 1990, Telmex was bought by a group of investors formed principally by Carlos Slim Helú, France Télécom, and Southwestern Bell Corporation, whose tender was the largest. However, controversially, the payment itself took place over the course of the next several years, using revenues from the phone service.

After privatization, Telmex began investing in new modern infrastructure, creating a partial fiber optic network throughout the nation, thus offering service to 30% of the Mexican territory.

In 1991, the Mexican government sold its remaining stock in Telmex.

From Wikipedia’s article on Telmex, shared under CC BY-SA 4.0.4

Leadership

Who has led Telmex, and when. Pick a name to see everywhere that person has worked.

Products and brands

  • telephone

Listed on Wikidata.1

Subsidiaries and ownership

Parent company

Owners

Subsidiaries

From Wikidata.1

Acquisitions

In January 2010, América Móvil, the largest mobile phone company in Latin America, made an offer to buy Telmex and Telmex International in order to better compete against Spain's Telefonica and Malaysia's Telekom Malaysia. The acquisition was approved by the CFC (Comisión Federal de Competencia) Antitrust Office in Mexico on February 11, 2010.

América Móvil was once the mobile arm of Telmex, but in 2001, América Móvil was split off and grew larger than the former parent company.

From Wikipedia’s article on Telmex, shared under CC BY-SA 4.0.4

Employees over time

  • 201001

Timeline

  1. 1947Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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