Carrier Call GmbH
Your business partner for telecommunications and more...

We are proud of our customers and their success in the market. Carrier Call’s success follows on the success of our customers, built on relationships driven by results, and forged from our keen and deep understanding of the telecommunication industry. Carrier Call works with many of the world’s most prominent and successful wholesale and retail carriers and strives to continuously improve their business. We view long term relationships with our customers as a prerequisite for high customer satisfaction. For us, customer satisfaction does not stop with completion of a project.

Now and in the future: Carrier Call is always at your service.

Some of our customers are:


Colt is Europe’s information delivery platform, enabling its customers through expertise in IT managed services, networking and communication solutions. Colt provides a complete portfolio of end-to-end communication services in a pan-European network, including voice, data, bandwidth and high-speed hosting solutions connecting 32 cities in 21 European countries, the United States and India.

Vodafone Kabel Deutschland

The Vodafone Company Kabel Deutschland (’KD’), Germany’s largest cable operator, offers its customers high definition (HD), digital (SD) and analog TV, Pay TV and DVR offerings, Video on Demand, broadband Internet (up to 200 Mbit/s), WiFi services and fixed-line Phone services via cable. Kabel Deutschland also distributes mobile services. Situated in Unterfoehring near Munich, the publicly listed company (MDAX, MSCI Europe, Stoxx 600 Europe) operates cable networks in 13 German federal states and supplies its services to approximately 8.3 million connected households. As of March 31, 2015, Kabel Deutschland had approximately 3,900 employees. For the fiscal year ended March 31, 2015, Kabel Deutschland reported revenues of €2,021 million and an Adjusted EBITDA of €939 million. Group GmbH & Co. KG

net group Beteiligungen GmbH & Co. KG, through its subsidiaries, provides outsourcing services to network operators and carriers in Germany. It primarily focuses on the provision of communication, billing, and debt collection services. The company offers infrastructure and triple play solutions, including high-speed Internet and telephony, managed services, network operations, and consulting services; and enterprise and carrier services, which include voice over Internet protocol services, as well as carrier services and scheduling of international telephone traffic. It also engages in billing, customer services, and client management operations, such as rating and billing, order and process management, claims management, and financial clearing; and involves in accounting and collection operations that include pre-judicial, judicial, and post-judicial collection, as well as long-term monitoring and end-customer support. In addition, net group provides mobile business solutions, including SMS/MMS messaging, mobile Internet solutions, premium SMS/MMS, and convergent portal solutions; and value-added services, such as added value telephone numbers, service numbers, adapted solutions for premium rate services, and IN services. net group Beteiligungen GmbH & Co. KG was founded in 2004 and is based in Flensburg, Germany.


UPC is one of the leading telecom and media providers in Austria and Switzerland and a subsidiary of Liberty Global. UPC Austria, together with UPC Switzerland, represents the regional organization Austria / Switzerland. The company provides 2 million private and business customers with fast and easy access to the digital world via fiber optic cables - at home and on the road. With more than 2,600 employees from 54 countries, the subsidiary of the British Liberty Global plc generated sales of EUR 1.62 billion in 2016

Carrier Call Reference: UPC Austria (E)
Carrier Call Referenz: UPC Austria (D)

Carrier Call Reference: UPC Schweiz (E)
Carrier Call Referenz: UPC Schweiz (D)


1&1 Versatel GmbH is one of the largest alternative providers of voice, Internet and data services for residential and business customers on the German market. 1&1 Versatel has a strong local and regional presence in the German broadband market and the second biggest fibre optic cable network. In 2007, the company generated preliminary sales of €700 million and had over 680,000 customers under contract at the end of the year. 1&1 Versatel has a workforce of approximately 1,000 and their own network in more than 250 Germany cities. Further information:

Carrier Call Reference: Versatel (E)
Carrier Call Referenz: Versatel (D)