Walter Denk

Part of United Internet AG, TROPOLYS Netz GmbH is a German company that provides telecommunication services. The company is based in Dusseldorf, Germany. The CEOs are Guido Mannshausen, Jörg Elsäßer, Walter Denk. The company was founded in 2009.

Part of United Internet AG, Tropolys Service GmbH is a German company that provides electrical installation services. The company is based in Dusseldorf, Germany. The CEOs of the company are Guido Mannshausen, Jörg Elsäßer, Walter Denk.

1&1 Versatel GmbH engages in the provision of telecommunication services for small, medium-sized, and large enterprises, public institutions, communities, and municipal companies. It offers telephone, Internet, mobile, hosting, voice and site networking, personal consulting, email and web protection services. The firm also manages and develops a fiber network infrastructure. The company was founded in 1999 and is headquartered in Berlin, Germany.

Part of United Internet AG, 1&1 Versatel Deutschland GmbH is a B2B provider for fiber optic internet, telephone, and networking. The company is based in Dusseldorf, Germany. The German company offers tailor-made internet solutions for businesses, including fiber optic, ADSL, SDSL, VDSL, or leased line, as well as fiber optic internet ranging from 2 Mbit/s to 1,000 Gbit/s. The company prioritizes the security of their clients' data and never pass it on to third parties. The CEOs of the company are Jan Lange, Claus Beck, Walter Denk. 1&1 Versatel also recommends the cellular products from 1&1.