Data Center Map


DOKOM21 is the regional telecommunications service provider based in Dortmund.

The company was founded 22 years ago as a subsidiary of the Dortmunder Stadtwerke (DSW21). The connection area of DOKOM21 includes besides Dortmund the cities Hagen, Herdecke, Holzwickede, Werl, Essen and Unna as well as Halver, Iserlohn, Kierspe, Lüdenscheid, Meinerzhagen, Menden, Altena, Plettenberg, Werdohl, Hemer, Herscheid and Schalksmühle in Märkischer Kreis.

The services range from telephone connections, Internet access via Voice-over-IP solutions and leased lines for location networking to cable TV and mobile communications. In addition, the offering includes online backup and data center services as well as multimedia services for the housing industry.

Whether server, rack or space rental - the right solution for every need!

DOKOM21 operates data centers with an area of 4,600 square meters and three physically separated locations in Dortmund. A modern building infrastructure with highly available fiber optic connections protects your sensitive corporate data securely and comprehensively. The N + 1 redundancy, which reliably guarantees secure operation, also contributes to this.

We provide you with data center solutions individually tailored to your requirements.

Visit Website
Visit Website


Headquartered in Dortmund, NRW