# Telecommunications companies headquartered in North Rhine-Westphalia
Tamtam tracks 32 Telecommunications companies headquartered in North Rhine-Westphalia. This list ranks all of them by number of employees on LinkedIn, led by Deutsche Telekom, Deutsche Glasfaser Unternehmensgruppe and 1&1 Versatel. Their median headcount is 217. Half of them were founded in 2000 or later. The most common headquarters are Cologne (7), Düsseldorf (7) and Bonn (2).
The telecommunications companies in North Rhine-Westphalia are a mix of large established players and younger firms, primarily focused on network infrastructure and service provision. Deutsche Telekom, with 67,270 employees, is a global communications and IT company. Deutsche Glasfaser, founded in 2011, builds and operates fiber optic connections in rural areas. 1&1 Versatel provides data, internet, and voice services for businesses, while NetCologne offers full communication services in the Cologne and Bonn regions. Huawei Deutschland, established in 2001, is a global provider of IT and telecommunications solutions.
A notable pattern among these companies is their strong presence in the infrastructure sector, with many specializing in fiber optics, 5G, and network expansion. Düsseldorf is a prominent hub, serving as the headquarters for Deutsche Glasfaser Unternehmensgruppe, 1&1 Versatel, Vantage Towers, and Huawei Deutschland, indicating a concentration of telecommunications activity in that city.
🇩🇪 North Rhine-Westphalia · 32 companies · Updated Nov 14, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Deutsche Telekom](https://www.tamtam.ai/c/deutsche-telekom) (telekom.com)
A leading global communications and information technology company with a diverse team of 206,000 colleagues creating innovative solutions for digital transformation | Telecommunications | 🇩🇪 Bonn | 67,270 | |
| 2 | [Deutsche Glasfaser Unternehmensgruppe](https://www.tamtam.ai/c/deutsche-glasfaser-unternehmensgruppe) (deutsche-glasfaser.de)
Planning, building, and operating open-access fiber optic connections for households, businesses, and public institutions in rural regions. | Telecommunications | 🇩🇪 Düsseldorf | 1,395 | 2011 |
| 3 | [1&1 Versatel](https://www.tamtam.ai/c/1-and-1-versatel) (1und1.net)
A leading German telecommunications specialist for businesses, providing data, internet, and voice services with a strong focus on expanding their extensive fiber infrastructure | Telecommunications | 🇩🇪 Düsseldorf | 1,183 | |
| 4 | [NetCologne](https://www.tamtam.ai/c/netcologne) (netcologne-unternehmen.de)
A regional telecommunications company in Cologne and Bonn, Germany, operating its own network and providing full communication services in the area | Telecommunications | 🇩🇪 Cologne | 958 | 1994 |
| 5 | [Vantage Towers](https://www.tamtam.ai/c/vantage-towers) (vantagetowers.com)
Leading tower company in Europe, connecting people, businesses, and devices through a vast network for faster, greener, and more efficient connectivity | Telecommunications | 🇩🇪 Düsseldorf | 769 | |
| 6 | [Deutsche Funkturm](https://www.tamtam.ai/c/deutsche-funkturm) (dfmg.de)
A leading infrastructure provider in Germany, offering services to mobile network operators, broadcasters, and authorities with a focus on LTE and 5G technologies | Telecommunications | 🇩🇪 Leverkusen | 600 | 2002 |
| 7 | [vitronet Gruppe](https://www.tamtam.ai/c/vitronet-gruppe) (vitronet.de)
Leading provider of telecommunications and energy infrastructure solutions, with over 2,700 employees across 40 locations in Germany Specializing in fiber optic, energy networks, 5G, and more | Telecommunications | 🇩🇪 Essen | 529 | |
| 8 | [Huawei Deutschland](https://www.tamtam.ai/c/huawei-deutschland) (huawei.com)
A global provider of information technology and telecommunications solutions with a focus on connectivity, computing, devices, automotive, digital power, and cloud services | Telecommunications | 🇩🇪 Düsseldorf | 490 | 2001 |
| 9 | [Gigaset](https://www.tamtam.ai/c/gigaset) (gigaset.com)
An internationally active holding company specializing in communication technology, offering cordless phones, smartphones, smart home solutions, and business telephony products | Telecommunications | 🇩🇪 Bocholt | 450 | 1900 |
| 10 | [AMEVIDA SE](https://www.tamtam.ai/c/amevida-se) (amevida.de)
A leading provider of customer care services in Germany, offering a wide range of future-oriented services in dialog marketing for various industries | Telecommunications | 🇩🇪 Gelsenkirchen | 367 | |
| 11 | [congstar](https://www.tamtam.ai/c/congstar) (congstar.de)
An innovative and flexible ICT company in Germany, offering a vibrant work environment with a blend of startup culture and corporate security | Telecommunications | 🇩🇪 Cologne | 365 | 2007 |
| 12 | [MEDIA BROADCAST GmbH](https://www.tamtam.ai/c/media-broadcast-gmbh) (media-broadcast.com)
A leading service provider in Germany's broadcasting and media industry, specializing in digitalization, multimedia transmission platforms, broadcasting, connectivity, and telecommunication services | Telecommunications | 🇩🇪 Cologne | 326 | 1961 |
| 13 | [Deutsche Telekom Außendienst GmbH](https://www.tamtam.ai/c/deutsche-telekom-aussendienst-gmbh)
A subsidiary of Deutsche Telekom AG, specializing in telecommunications, IT, and IP products and services for private, business, and carrier customers nationwide | Telecommunications | 🇩🇪 Bonn | 322 | |
| 14 | [1NCE](https://www.tamtam.ai/c/1nce) (1nce.com)
Global provider of affordable, secure, and reliable cellular connectivity and software services for IoT devices in over 150 countries Headquarters in Cologne, Germany | Telecommunications | 🇩🇪 Cologne | 279 | 2017 |
| 15 | [STF Gruppe](https://www.tamtam.ai/c/stf-gruppe) (stf-gruppe.de)
An innovative engineering company providing tailored services in telecommunication, digitalization, IT, and technical building planning with 500+ employees across 18 locations nationwide | Telecommunications | 🇩🇪 Dülmen | 256 | 1997 |
| 16 | [Triopt Group](https://www.tamtam.ai/c/triopt-group) (triopt-group.de)
TRIOPT GmbH provides technical services for planning, implementing, and optimizing wireless and fixed networks for mobile operators and system suppliers | Telecommunications | 🇩🇪 Moers | 217 | 2010 |
| 17 | [Insyte Deutschland GmbH](https://www.tamtam.ai/c/insyte-deutschland-gmbh) (insytedeutschland.de)
Providing high-quality installation, operation, and maintenance services for network infrastructures across various sectors with tailored end-to-end solutions. | Telecommunications | 🇩🇪 Ratingen | 183 | 2017 |
| 18 | [GlasfaserPlus GmbH](https://www.tamtam.ai/c/glasfaserplus-gmbh) (glasfaserplus.de)
Bringing fast and reliable internet to rural areas to ensure digital inclusion for all, striving to make it as essential as water and electricity | Telecommunications | 🇩🇪 Cologne | 179 | 2022 |
| 19 | [Circet Deutschland SE](https://www.tamtam.ai/c/circet-deutschland-se) (circet.de)
A leading telecommunications infrastructure provider with over 15,000 employees across multiple countries, specializing in turnkey projects, E-Mobility, and mobile network construction | Telecommunications | 🇩🇪 Bergisch Gladbach | 178 | 2018 |
| 20 | [mobilezone Deutschland](https://www.tamtam.ai/c/mobilezone-deutschland) (mobilezone.org)
A leading e-commerce company in the telecommunications sector, specializing in mobile phone offers with pay monthly contracts and fast, secure dispatch of goods | Telecommunications | 🇩🇪 Cologne | 166 | 2000 |
| 21 | [ecotel communication ag](https://www.tamtam.ai/c/ecotel-communication-ag) (ecotel.de)
A company specializing in business networking and innovation, preparing businesses for the digital workplace and helping them achieve their goals | Telecommunications | 🇩🇪 Düsseldorf | 161 | 1998 |
| 22 | [TÜV Rheinland LGA Products GmbH](https://www.tamtam.ai/c/tuv-rheinland-lga-products-gmbh)
Global service provider offering independent expertise in quality, safety for people, environment, and technology Trusted for ensuring superior standards | Telecommunications | 🇩🇪 Herford | 155 | |
| 23 | [Nothelle Call Center Services GmbH](https://www.tamtam.ai/c/nothelle-call-center-services-gmbh) (nothelle.de)
A communication service provider facilitating meaningful dialogues between renowned companies and customers to build long-lasting relationships, emphasizing employee growth and success | Telecommunications | 🇩🇪 Duisburg | 151 | 1997 |
| 24 | [Westconnect](https://www.tamtam.ai/c/westconnect) (westconnect.de)
The company specializes in laying fiber optic networks in western Germany, providing fast internet services to households and businesses | Telecommunications | 🇩🇪 Essen | 148 | |
| 25 | [Bureau Veritas CPS Technology (former 7layers)](https://www.tamtam.ai/c/bureau-veritas-cps-technology-former-7layers) (7layers.com)
An international testing, certifying, and consulting service provider specializing in wireless technologies for various industries, offering a range of services and smart solutions | Telecommunications | 🇩🇪 Ratingen | 104 | 1999 |
| 26 | [CPI VERTEX ANTENNENTECHNIK GmbH](https://www.tamtam.ai/c/cpi-vertex-antennentechnik-gmbh) (vertexant.com)
Designing, manufacturing, and constructing precision antennas and antenna systems, including commercial transactions for satellite communication products with worldwide delivery. | Telecommunications | 🇩🇪 Duisburg | 65 | |
| 27 | [Huawei Cloud Europe](https://www.tamtam.ai/c/huawei-cloud-europe) (huaweicloud.com)
A company offering a wide range of services through cloud technology, providing solutions for various needs | Telecommunications | 🇩🇪 Düsseldorf | 56 | |
| 28 | [telegra GmbH](https://www.tamtam.ai/c/telegra-gmbh) (telegra.com)
This company specializes in providing solutions for professional customer communication, including dialog systems, plug-ins, interfaces, and APIs to enhance customer interaction and streamline processes | Telecommunications | 🇩🇪 Cologne | 42 | 1997 |
| 29 | [HUBER+SUHNER BKtel GmbH](https://www.tamtam.ai/c/huber-suhner-bktel-gmbh) (bktel.com)
Development and supply of advanced broadband communication components and services including network planning, installation, and training for efficient network operation. | Telecommunications | 🇩🇪 Hückelhoven-Baal | 39 | 1997 |
| 30 | [Apelby](https://www.tamtam.ai/c/apelby) (apelby.com)
A global telecommunications provider offering voice, data, messaging, and outsourcing services with a strong presence in key regions worldwide | Telecommunications | 🇩🇪 Düsseldorf | 31 | 2005 |
| 31 | [CALLAX Holding GmbH](https://www.tamtam.ai/c/callax-holding-gmbh) (callax.net)
A leading European telecommunications company offering innovative solutions and services in Germany, France, Spain, and the United Kingdom, focusing on customer value and satisfaction | Telecommunications | 🇩🇪 Monheim | 16 | |
| 32 | [TMTkom GmbH](https://www.tamtam.ai/c/tmtkom-gmbh) (tmtkom.de)
A growing trade and craft business with over 200 employees, specializing in telecommunications, network-based technology, and multimedia connections, prioritizing quality and customer satisfaction | Telecommunications | 🇩🇪 Mülheim an der Ruhr | 15 | 2000 |
## How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 14, 2026.
## More company lists in North Rhine-Westphalia
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- [Family-owned companies in North Rhine-Westphalia](https://www.tamtam.ai/l/family-owned-companies-north-rhine-westphalia) (335)
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- [Financial services firms in North Rhine-Westphalia](https://www.tamtam.ai/l/financial-services-firms-north-rhine-westphalia) (238)
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- [SaaS companies in North Rhine-Westphalia](https://www.tamtam.ai/l/saas-companies-north-rhine-westphalia) (201)
- [Corporate groups and holding companies in North Rhine-Westphalia](https://www.tamtam.ai/l/holding-companies-north-rhine-westphalia) (189)
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- [IT Services and IT Consulting companies in North Rhine-Westphalia](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-north-rhine-westphalia) (171)
- [Public sector organisations in North Rhine-Westphalia](https://www.tamtam.ai/l/public-sector-organisations-north-rhine-westphalia) (160)
- [Logistics companies in North Rhine-Westphalia](https://www.tamtam.ai/l/logistics-companies-north-rhine-westphalia) (148)
- [Professional services firms in North Rhine-Westphalia](https://www.tamtam.ai/l/professional-services-firms-north-rhine-westphalia) (147)
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- [Financial Services companies in North Rhine-Westphalia](https://www.tamtam.ai/l/financial-services-companies-north-rhine-westphalia) (126)
- [Consulting firms in North Rhine-Westphalia](https://www.tamtam.ai/l/consulting-firms-north-rhine-westphalia) (112)
- [E-commerce companies in North Rhine-Westphalia](https://www.tamtam.ai/l/ecommerce-companies-north-rhine-westphalia) (110)
- [Automotive manufacturers and suppliers in North Rhine-Westphalia](https://www.tamtam.ai/l/automotive-companies-north-rhine-westphalia) (103)
- [Distributors and wholesalers in North Rhine-Westphalia](https://www.tamtam.ai/l/distributors-and-wholesalers-north-rhine-westphalia) (103)
## The same list elsewhere in Germany
- [Telecommunications companies in Germany](https://www.tamtam.ai/l/telecommunications-companies-germany) (80)
## The same list elsewhere
- [Telecommunications companies in the world](https://www.tamtam.ai/l/telecommunications-companies-in-the-world) (3,307)
- [Telecommunications companies in Europe](https://www.tamtam.ai/l/telecommunications-companies-in-europe) (1,294)
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Source: https://www.tamtam.ai/l/telecommunications-companies-north-rhine-westphalia