Dark Fiber Network Market to Reach USD 17.0 Billion by 2034, Growing from USD 7.2 Billion in 2025 - SRI

London, UK - August 2026 | Strategic Revenue Insights Inc. - AI data center build-out is emerging as one of the most concrete forces reshaping dark fiber demand, as hyperscalers race to secure high-count fiber routes between campuses and metro hubs rather than compete for scarce lit network capacity. According to a new report from Strategic Revenue Insights Inc., the global dark fiber network market was valued at USD 7.2 billion in 2025 and is forecast to reach USD 17.0 billion by 2034, growing at a CAGR of 10.00% during the forecast period. Lead analyst Kamrul Hasan noted that hyperscalers are increasingly leasing dark fiber outright to control scalability and security rather than relying solely on carrier-lit networks. The findings are based on primary interviews with telecom operators, hyperscale and data center infrastructure teams, and government broadband stakeholders, supplemented by secondary research spanning North America, Europe, Asia Pacific, Latin America, and the Middle East and Africa.

Key Takeaways

• The dark fiber network market is valued at USD 7.2 billion in 2025 and is projected to reach USD 17.0 billion by 2034, at a CAGR of 10.00%.
• Telecom Operators & ISPs are the largest end-user segment, while 5G Backhaul Providers are the fastest-growing as 5G deployment accelerates.
• AI data center interconnection is driving hyperscalers to lease dark fiber directly for scalability and security rather than relying on lit capacity alone.
• North America leads the market with extensive infrastructure and high demand, while Asia Pacific is the fastest-growing region.
• Zayo, Lumen Technologies, and Crown Castle Fiber are among the leading competitors shaping the market.

Full report access: https://www.strategicrevenueinsights.com/industry/dark-fiber-network-market

AI Infrastructure Build-Out and 5G Densification Are Reshaping Fiber Demand

The interconnection needs of AI data centers are pushing hyperscalers to secure high-count dark fiber routes between campuses and metro areas, and many are choosing to lease and control that fiber directly rather than depend on carrier-lit capacity for scalability and security. This shift is turning hyperscalers into some of the most consequential buyers in the market alongside traditional telecom operators.

5G densification is adding to that demand. Carriers need deep fiber backhaul to support denser 5G networks, and the broader proliferation of IoT devices and smart city initiatives is creating additional pressure on network capacity, positioning 5G Backhaul Providers as the fastest-growing end-user segment.

Government broadband funding is reinforcing supply on the other side of the market, building out middle-mile fiber that is then offered as dark fiber to operators. At the same time, companies are investing in sustainability and energy efficiency, including renewable energy sources and more efficient network equipment, both to meet regulatory expectations and to appeal to environmentally conscious customers and investors.

Market Segmentation

By Fiber Type: Single-Mode fiber is favored for long-distance, high-bandwidth connectivity sought by telecom operators and data centers, while Multi-Mode fiber serves growing short-distance data transmission needs in enterprise networks and data centers.

By Network Type: Metro Dark Fiber is seeing significant growth from urban high-speed demand, Long-Haul / Intercity networks remain essential for connecting regions over long distances, and Subsea Segments are gaining importance as intercontinental data transmission and undersea cable projects expand.

By Material: Glass Optical Fiber is the most widely used material given its superior performance over long distances, while Plastic Optical Fiber is gaining popularity for its flexibility and ease of installation in short-distance applications.

By End User: Telecom Operators & ISPs are the largest segment on the strength of continued network expansion investment, while 5G Backhaul Providers are the fastest-growing as 5G deployment accelerates; Hyperscalers & Data Centers, Enterprises & BFSI, and Government & Research Networks are also significant contributors.

Regional Outlook

North America leads the dark fiber network market on the strength of its extensive infrastructure and high demand. Asia Pacific is the fastest-growing region as digital transformation initiatives accelerate. Europe continues to contribute meaningfully to global demand, while Latin America is showing significant growth potential as it builds out digital infrastructure, and the Middle East & Africa are also part of the market's regional footprint.

Competitive Landscape

Zayo is a prominent player known for its extensive network infrastructure and strategic acquisitions, with a focus on expanding network reach to meet growing demand for high-speed data transmission. Lumen Technologies, formerly CenturyLink, offers a wide range of network solutions including dark fiber and is focused on expanding its network to meet evolving customer needs. Crown Castle Fiber is recognized for its extensive network infrastructure and strategic investments in new technologies as it works to expand reach and enhance its service offerings.

Market Restraints

Competition from alternative network technologies such as wireless and satellite communications, which are becoming more advanced and cost-effective, poses a challenge to dark fiber growth, while regulatory changes and increased scrutiny on network security and reliability are raising compliance costs for market participants.

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Frequently Asked Questions

How big is the dark fiber network market?

The dark fiber network market was valued at USD 7.2 billion in 2025 and is projected to reach USD 17.0 billion by 2034, growing at a CAGR of 10.00%.

What is driving growth in the dark fiber network market?

Growth is driven by rising demand for high-speed internet and data transmission, AI data center interconnection needs, and the deployment of 5G networks requiring deep fiber backhaul.

Which region leads the dark fiber network market?

North America leads the market with extensive infrastructure and high demand, while Asia Pacific is the fastest-growing region through 2034.

Who are the top companies in the dark fiber network market?

Leading companies include Zayo, Lumen Technologies, and Crown Castle Fiber, each known for extensive network infrastructure and continued investment in network expansion.

About Strategic Revenue Insights Inc.

Strategic Revenue Insights Inc., part of SRI Consulting Group Ltd, is a London-headquartered market intelligence firm that helps organizations across industries and geographies make evidence-based revenue and strategy decisions. The firm produces syndicated research reports and customized consulting engagements built on rigorous market sizing, forecasting, and competitive benchmarking, drawing on a globally connected team of analysts and consultants.

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