The 21 ViaNet (formerly A-1 NetCom) Beijing-3 Internet Data Center is 21 ViaNet's flagship facility in the People's Republic of China. This facility houses co-location and web hosting facility as an adaptive reuse of an existing factory facility as well as the corporate offices and Network Operations Center. 21 ViaNet is one of China's premier providers of co-location facilities and web hosting services.

Supported by static UPS systems and conventional engine generators, this facility incorporates cost effective, reliable critical infrastructure design. Cooling is provided by an air-cooled DX split system. All critical support systems are configured for maintainability without interruption of computer operations.