Private company

Telekom Greece

Logo: Telekom Greece, Public domain, via Wikimedia Commons³

Greek telecommunications and media company

Cosmote was the largest mobile network operator in Greece and a division of OTE. It was dissolved and absorbed by its parent on 2 January 2024. Outside of Greece, previous operations included COSMOFON in North Macedonia (now A1), GLOBUL in Bulgaria (now Yettel), Telekom in Albania (now One) and Telekom in Romania (now Vodafone).² It employed about 10,000 people.¹ It is part of Telekom (Greece).¹ Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Oct 3, 1998Founded¹

Industryinsurance broker, mobile phone industry, telecommunications industry¹
HeadquartersAthens¹
Websitewww.telekom.gr
Legal formAnonymi Etaireia¹

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Cosmote was the largest mobile network operator in Greece and a division of OTE. It was dissolved and absorbed by its parent on 2 January 2024.²

Corporate structure

Telekom Greece is part of a group headed by Deutsche Telekom. 267 entities, 34 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Deutsche Telekom Bonn, Germany
- Slovak Telekom 100% · Bratislava, Slovakia
- T-Mobile Austria 100% · Wien, Austria
- T-Mobile Czech Republic 100% · Praha 4, Czechia
  - CE Colo Czech s.r.o. Subsidiary · Praha 10, Czechia
- T-Mobile Polska 100% · Warszawa, Poland
- T-Systems International GmbH 100% · Bonn, Germany
- Telekom Deutschland 100% · Bonn, Germany
  - Deutsche Telekom Vertrieb Subsidiary · Germany
- Telekom (Greece) 48.29% · Marousi, Greece
  - Telekom Greece 100% · Athens
  - MagentaTV Greece Subsidiary · 100% · Athens
  - OTEGlobe Subsidiary · 100% · Athens
  - Otenet Subsidiary · Athens
  - COSMOTE PAYMENTS - YPIRESIES ILEKTRONIKOU CHRIMATOS ANONYMOS ETAIREIA Subsidiary · Marousi, Greece
  - OTE Museum of Telecommunications Subsidiary · Kifisia Municipality, Greece
  - OTE PLC Subsidiary · London, United Kingdom
  - OTE Tower Owned · Thessaloniki Municipality, Greece
- Deutsche Telekom MMS Dresden, Germany
- T-Mobile US Wilmington, Delaware, United States
  - iWireless Subsidiary · Urbandale
  - Metro by T-Mobile Subsidiary · Richardson
  - Ultra Mobile Subsidiary
  - APC Realty and Equipment Company, LLC Subsidiary · Delaware, United States
  - Assurance Wireless USA, L.P. Subsidiary · Delaware, United States
  - ATI Sub, LLC Subsidiary · Delaware, United States
  - Blis Ad Platform Private Limited Subsidiary · India
  - Blis Global Spain, S.L. Subsidiary · Spain
  - Blis Italia S.r.l. Subsidiary · Italy
  - Blis Media Pty Pte. Ltd. Subsidiary · Singapore
  - Blis Netherlands B.V. Subsidiary · Netherlands
  - Blis USA, Inc. Subsidiary · Delaware, United States
  - BlisMedia (Australia) Pty Ltd Subsidiary · Australia
  - Breeze Acquisition Sub LLC Subsidiary · Delaware, United States
  - Clearwire Communications LLC Subsidiary · Delaware, United States
  - Clearwire International, LLC Subsidiary · Washington, United States
  - Clearwire Legacy LLC Subsidiary · Delaware, United States
  - Clearwire Spectrum Holdings II LLC Subsidiary · Nevada, United States
  - Clearwire Spectrum Holdings III LLC Subsidiary · Nevada, United States
  - Clearwire Spectrum Holdings LLC Subsidiary · Nevada, United States
  - Fiber JV Holdings LLC Subsidiary · Delaware, United States
  - Finco Depositor I LLC Subsidiary · Delaware, United States
  - Finco Depositor II LLC Subsidiary · Delaware, United States
  - Finco Depositor III LLC Subsidiary · Delaware, United States
  - Finco Depositor IV LLC Subsidiary · Delaware, United States
  - and 111 more
- T-Systems (Singapore) Singapore, Singapore
- T-Mobile UK Subsidiary · 100% · Hatfield
- Magyar Telekom Subsidiary · 59.23% · Budapest
  - FutureZone Subsidiary
- Hrvatski Telekom Subsidiary · 51% · Zagreb
  - BonBon Subsidiary · Zagreb
- Albanian Mobile Communications Subsidiary · Tirana
- Comfortcharge Subsidiary · Bonn, Germany
- congstar Subsidiary · Cologne
- Crnogorski Telekom Subsidiary · Podgorica
- Detecon Subsidiary · Cologne
- Deutsche Funkturm Subsidiary · Leverkusen, Germany
- Deutsche Telekom (United Kingdom) Subsidiary · Welwyn Garden City, United Kingdom
- Deutsche Telekom IT Solutions Slovakia Subsidiary · Košice, Slovakia
- Deutsche Telekom Services Europe Czech Republic Subsidiary · Brno, Czech Republic
- Magenta Telekom Subsidiary
- Makedonski Telekom Subsidiary · Skopje
- One Albania Subsidiary · Tirana
- and 68 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

COSMOTE launched commercial operations in Greece in April 1998 and reached 1 million subscribers a year later. In 2000, the company was listed in the Athens Exchange. In 2001, COSMOTE reached a customer base of 2.5 million becoming the largest mobile network operator in Greece.

In 2006, COSMOTE acquired 99% of Germanos SA from its owner Panos Germanos, a multinational chain of retail electronic goods vendors. During the same year COSMOTE was listed among the top performers in the technology industry worldwide according to BusinessWeek's Information Technology 100 rankings, being the only Greek company in the list.

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

Products and brands

Telekom Romania: In July 2005, COSMOTE acquired 70% of the Romanian operator COSMOROM which was the mobile arm of Romanian national incumbent operator Romtelecom. Later that year, COSMOROM was rebranded to COSMOTE Romania. In November 2009, COSMOTE acquired Telemobil SA (Zapp), the first CDMA 450 MHz mobile phone operator in Romania, thereby gaining access to 3G license and infrastructure in the country.

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

Subsidiaries and ownership

Parent company

Telekom (Greece)

Subsidiaries

Albanian Mobile Communications

Former owners and parents

Telekom (Greece) 100% until Jan 2, 2024

From Wikidata.¹

Timeline

Jan 2, 2024Dissolved Dissolved¹
Oct 3, 1998Founded Founded¹

Sources

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

1
WikidataTelekom Greece on Wikidata
2
WikipediaTelekom Greece on Wikipedia
3
Wikimedia CommonsTelekom Greece logo by Telekom Greece, Public domain
4
WikipediaTelekom Greece on Wikipedia (revision used)