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Who is 21Vianet Group?
21Vianet Group is a China-based data center and digital infrastructure services provider that offers colocation, cloud, and network services for enterprises and large-scale internet and cloud platforms.
- Wholesale and retail data center colocation services for enterprises and cloud providers (data center infrastructure)
- Managed hosting and infrastructure operation services, including power, cooling, and on-site maintenance (managed infrastructure services)
- Enterprise cloud and hybrid IT enablement in cooperation with global cloud platforms (cloud infrastructure services)
- Network interconnection and bandwidth services supporting internet and cloud workloads (network connectivity)
- Design, build, and operation of carrier-neutral data centers in multiple Chinese metropolitan areas (data center development)
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More About 21Vianet Group
21Vianet Group operates carrier-neutral data centers and related infrastructure services that are used by enterprises, internet companies, and cloud service providers that require data center capacity within mainland China. The company focuses on colocation, cloud infrastructure enablement, and network connectivity, providing space, power, and environmental control for customer IT and cloud infrastructure in purpose-built facilities.
From an enterprise architecture perspective, 21Vianet Group functions as a core physical layer and facilities provider within hybrid and multi-cloud strategies. Customers deploy servers, storage systems, and networking gear in 21Vianet-operated data halls, integrating these assets with public cloud platforms and private data centers over secure network links. This model supports workloads that require data residency in China, low-latency access for local users, or colocated access to major network and cloud ecosystems.
21Vianet Group’s data centers are designed to support standard enterprise architectures, including multi-tier application deployments, virtualized environments, and container-based workloads. The facilities typically integrate widely adopted technologies such as IP-based networking, redundant power distribution, and industry-standard cooling systems. Customers use common routing and switching protocols, VPNs, and dedicated network connections to interconnect their colocated environments with external networks, branch locations, and public clouds.
The company’s managed services layer includes remote hands, equipment installation, and operational monitoring at the infrastructure level, which can simplify lifecycle management for enterprise IT teams. By outsourcing power, cooling, physical security, and basic infrastructure operations to 21Vianet Group, organizations can focus internal resources on application platforms, data management, and security controls that operate on top of the colocated hardware.
In the context of marketplace categorization, 21Vianet Group aligns with data center colocation (data center infrastructure), carrier-neutral interconnection (network connectivity), and cloud enablement (cloud infrastructure services). Its facilities support integration with multiple carriers and network providers, which allows enterprises to design network topologies that balance latency, redundancy, and cost. For international technology and cloud companies that operate in China through local arrangements, 21Vianet Group provides the underlying physical and operational environment that hosts localized infrastructure in compliance with local requirements.
Technical stakeholders evaluating 21Vianet Group typically focus on facility locations, power density support, redundancy design, connectivity options, and service-level commitments. These characteristics determine how well the company’s infrastructure can support high-availability architectures, Disaster Recovery (DR) setups, and performance-sensitive digital services targeted at users and customers in China.
Our description of 21Vianet Group. Updated December 2025.
