Dark Fiber Services

HARBOR LINK’S capacity-rich dark fiber network connects key corridors across Maryland, Washington, D.C., and Virginia. Engineered for speed, security, scalability, and long-term reliability, our solutions empower hyperscalers, enterprises, and government agencies to support today’s most data-intensive applications.

Low-latency routes along the I-95 corridor and beyond

Flexible lease and
IRU options

100% underground routes built with brand-new fiber

Customizable and carrier-neutral design

Private Conduit

HARBOR LINK’s private conduit infrastructure provides the foundation for secure, scalable network ownership. Built entirely underground and engineered for long-term performance, our conduit systems give carriers, enterprises, and government agencies the flexibility to install and manage their own fiber while maintaining full control of their connectivity.

  • Install and manage your own fiber
  • 24/7 authorized access to Harbor Link vaults and manholes with specified notice 
  • Diverse, redundant routing options
  • Designed to grow with future demands

Underground Conduit System Cross Section

Each Harbor Link route is built with protection and longevity in mind. Locking manhole covers, reinforced concrete vaults, and encased duct banks safeguard fiber from intrusion, environmental exposure, and accidental construction damage.

  • Fully underground routes minimize risk of disruption
  • Built to meet or exceed regional and federal infrastructure standards
  • Designed for long-term reliability and ease of maintenance

Custom Private Networks

For customers with specialized connectivity requirements, Harbor Link designs and builds custom fiber and conduit networks, ranging from single campuses to regional closed-loop systems.

  • Options to build closed-loop networks for public and private clients
  • Tailored builds for secure, high-performance connectivity
  • Ideal for municipalities, universities, and enterprise campuses

Conduit. Fiber. Control.