Private company

Detecon

Logo: edited by Körnerbrötchen, Public domain, via Wikimedia Commons3

German Enterprise

Detecon International GmbH is a German management and technology consulting company headquartered in Cologne. Established in 1977, it is part of the Deutsche Telekom Group and advises corporate and public sector organizations on digital transformation, IT and technology strategy, and telecommunications.Detecon also serves as a consulting partner for the Advisory Services division of Telekom subsidiary T-Systems International GmbH.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

Aug 1, 2002Founded1
  • Industryconsulting company1
  • HeadquartersCologne1
  • Websitewww.detecon.com
  • Legal formGesellschaft mit beschränkter Haftung1

Detecon International GmbH is a German management and technology consulting company headquartered in Cologne. Established in 1977, it is part of the Deutsche Telekom Group and advises corporate and public sector organizations on digital transformation, IT and technology strategy, and telecommunications.Detecon also serves as a consulting partner for the Advisory Services division of Telekom subsidiary T-Systems International GmbH.2

Corporate structure

Detecon is part of a group headed by Deutsche Telekom. 266 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
      • 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
    • Detecon Cologne
    • 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
    • Hrvatski Telekom Subsidiary · 51% · Zagreb
    • Albanian Mobile Communications Subsidiary · Tirana
    • Comfortcharge Subsidiary · Bonn, Germany
    • congstar Subsidiary · Cologne
    • Crnogorski Telekom Subsidiary · Podgorica
    • 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

The company was founded in 1977 under the name Deutsche Telepost Consulting as an affiliated entity of Deutsche Bundespost in Bonn, with a focus on providing consulting services to the international telecommunications industry.

Its current structure dates back to 1 August 2002, when a merger with Diebold Deutschland GmbH created the present-day Detecon International GmbH. Diebold itself had been founded in 1954 by John Diebold in New York City and established a presence in Germany in 1959. Ownership of Diebold Deutschland later transferred to debis Systemhaus GmbH, a subsidiary of Daimler-Benz AG, in 1991.

Following Deutsche Telekom’s acquisition of debis Systemhaus in 2002 and its integration into T-Systems, Diebold was subsequently merged with Detecon as part of a broader corporate restructuring.

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

Products and brands

Services

Detecon provides management and technology consulting services. Its areas of work include IT and digital strategy, cloud transformation, network transformation, cybersecurity, artificial intelligence, data management, and process digitalization.

The company supports clients in the design and implementation of digital infrastructure and technology-driven business solutions across a range of industries, including telecommunications, transport and logistics, manufacturing, and the public sector.

Locations

Detecon operates 18 offices worldwide across Europe, the Middle East, Asia, and Africa, including in Germany, Austria, Sweden, Switzerland, China, Thailand, the United Arab Emirates, and the United States. The company has been involved in consulting projects in more than 130 countries.

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

Subsidiaries and ownership

Parent company

From Wikidata.1

Timeline

  1. Aug 1, 2002Founded Founded1

Sources

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

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