Uwe Knoke

Part of 3U Holding AG, LineCall Telecom GmbH is a telecommunications company based in Marburg, Germany. The German company provides Preselection services that allow customers to make calls at a lower price and with high network quality. In addition, LineCall offers efficient solutions for business customers through its flexible tariff model, BusinessFlex. The company was founded in 2002, and its CEOs are Michael Schmidt and Uwe Knoke.

OneTel Telecommunication GmbH provides call-by-call and call-through services to both private and business customers. The private company is based in Marburg, Germany. The German company offers optimal service at the best possible prices. Customers can contact their support team via phone, email, or contact form. The CEOs are Christoph Hellrung and Uwe Knoke. The company was founded in 1999.

Part of 3U Holding AG, cs communication systems GmbH is a German company that provides communications and data technology services. The company is based in Pleidelsheim, Germany. The CEOs are Uwe Knoke, Rainer Thum, Jörg Dießner. The company was founded in 1990. cs communication systems was acquired by 3U Holding AG on August 30, 2023.

Selfio GmbH provides heating, ventilation, plumbing and solar heat and energy products. Its products are sold directly and online. The firm's products Ventilation, heat pumps, solar, chimneys, fireplaces, radiators, pellet stoves and grills. The company is headquartered in Linz am Rhein, Germany.

Part of euNetworks Group Ltd., Lambdanet Communications Deutschland AG provides telecommunications and internet services. The company is based in Hannover, Germany. Markus Weiland has been the CEO of the German company since 2013. Lambdanet Communications Deutschland was acquired by euNetworks GmbH from 3U Holding AG on May 31, 2011 for $35.63 million.