The global digital system is growing fast as more businesses move their services online. Because of this, the need for systems that move data is also growing. At the center of this system is the data center network. It connects servers, storage, and computing systems inside and between data centers. A strong network helps data move quickly and reliably. This is very important for hyperscalers, OTT providers, and telecommunications companies that handle large amounts of data traffic.
As more people use cloud services, video streaming, and mobile apps, the demand for strong and scalable networks continues to increase. In this article, we explain what a data center network is, which countries have the most data centers, and how much it costs to run one.
What Is a Data Center Network?
A data center network is the system that connects all the equipment inside a data center. It links routers, switches, servers, and storage devices so they can send and receive data. Without this network, the systems inside a data center cannot communicate with each other or connect to outside networks.
Data center networks use several types of fiber connections. Long-haul fiber carries data across long distances, such as between cities or countries. Metro fiber connects locations within the same city. Last-mile fiber connects the main network to buildings or end users. Together, these connections create a full network path that allows fast data transfer with low delay.
Another important connection is dark fiber. Dark fiber is fiber optic cable that is already installed but not yet being used. Companies can lease dark fiber to build their own private and high-capacity networks. This also gives them more control over their network performance. According to Grand View Research, the global dark fiber market was worth about USD 6.90 billion in 2025 and is expected to grow about 15.9% per year from 2026 to 2033.
Which Country Has the Most Data Centers?
The United States has the most data centers in the world. According to Statista (2024), the country has 4,165 data centers. Germany, the United Kingdom, and China come next. These countries invest a lot in data center systems to support cloud services, business systems, and online trade.
In Southeast Asia, the market of a data center network is growing very fast. Singapore has been the main data center hub in the region. However, the country paused for new data center building for some time, and the pause ended in 2022. Because of this, many new projects are now moving to nearby countries such as Malaysia, Indonesia, and Thailand.
This growth happens because more people and businesses use cloud services, mobile internet, and digital tools. Because of this, the need for strong data center network connections is also growing. This includes dark fiber, long-distance fiber, and metro fiber networks across Malaysia, Indonesia, Singapore, and Thailand.
How Much Does It Cost to Run a Data Center?
Running a data center network costs a lot of money. The cost depends on the size, location, and type of the facility. The main costs include power and cooling, hardware, staff, software licenses, and network connections. Electricity is often the biggest cost.
According to the International Energy Agency (IEA), data centers around the world used about 415 terawatt-hours of electricity in 2025. A McKinsey report shows that data centers for AI processing may need $5.2 trillion in investments, while those for regular IT work may need $1.5 trillion. In total, nearly $7 trillion will be needed for data centers by 2030, which is a huge amount of money.
Building the Right Network Foundation for the Future
A strong data center network is the foundation of modern digital services. As data continues to grow, companies need faster and more reliable networks. Because of this, good network infrastructure is becoming more important than ever.
The United States still has the most data centers in the world, but Southeast Asia is growing quickly. Countries such as Malaysia, Indonesia, Singapore, and Thailand are becoming important locations for new data center development. Running a data center requires a large investment. However, solutions like dark fiber can help companies build private and high-capacity networks while also controlling costs.
For hyperscalers, OTT providers, and telecommunications companies in Southeast Asia, choosing a reliable dark fiber provider is very important. ARNet is a dark fiber infrastructure provider with a wide network across Malaysia, Indonesia, Singapore, and Thailand. ARNet provides dark fiber, long-haul fiber, metro fiber, and last-mile fiber services. These services help businesses build private, high-bandwidth connections between data centers and important network locations with flexible and scalable connectivity.
About the Author
Nabila Choirunnisa, Digital Marketing Executive at ARNet