Searching for top Dark Fiber providers in Washington? Here's your ultimate guide to making an informed choice.
What is Dark Fiber?
Dark Fiber refers to unused fiber optic cabling laid by telecommunications providers. Unlike lit fiber, which is actively transmitting data, dark fiber remains unlit and requires the user to install and maintain the necessary electronics to light it up. This allows for greater control and customization of network infrastructure.
Dark Fiber providers are also location-based, relying on the availability of specific network infrastructure in a given area. Proximity to major cities often increases the likelihood of access to dark fiber services, while more remote areas may face challenges due to the high costs of installation and maintenance.
Overview of Providers in Washington Offering Dark Fiber
There are many Dark Fiber providers to choose from in Washington, with an estimated 55 available based on Lightyear’s network intelligence—the industry’s most comprehensive dataset.
Actual provider availability also depends on fiber infrastructure near a specific address—so while many exist citywide, not all are quote-ready for every location. Comparing options can quickly become overwhelming.
To help simplify your research, we've compiled a definitive list of providers offering Dark Fiber in Washington, which you can explore below.
You can also schedule a demo with the Lightyear team for expert support navigating telecom procurement. Provider availability differs significantly by location, and Lightyear’s network intelligence helps businesses identify the right-fit options based on real infrastructure data.

Local Telcos in Washington with Dark Fiber
Local telcos, offering wireline telephone services across Washington, possess extensive fiber infrastructure, making them ideal for Dark Fiber. They provide broader service coverage compared to regular providers, who may only cover specific city regions.

The local telcos in Washington that offer Dark Fiber are:
- BrightSpeed: Known for its fast and reliable fiber and broadband plans, BrightSpeed offers a range of high-speed internet services. Their unique selling points include no annual contracts, transparent pricing, and a focus on expanding connectivity in underserved areas.
- Lumen Technologies: Lumen provides Dark Fiber solutions designed to offer high-capacity, scalable, and secure connectivity. They stand out with their AI-ready infrastructure, low latency, and partnerships with leading technology companies like AWS and Microsoft.
- Relyant Communications: Relyant boasts the area’s only 100% fiber optic network, offering high-speed internet that surpasses DSL, cable, and satellite. They emphasize unparalleled customer support and a direct line to the home for constant connectivity.
- Verizon: Verizon offers a wide range of business internet and network solutions, including promotional offers like iPhone deals and savings for switching. Their comprehensive solutions cover mobile, internet, security, and more, with a global presence and no annual contracts for business internet plans.
Local Cable Companies in Washington with Dark Fiber
Local cable companies originally built cable television infrastructure throughout Washington, which they now use to deliver ISP and business connectivity services. While their residential services typically rely on coaxial cables, their enterprise offerings—like Dark Fiber—are usually delivered over fiber infrastructure, with availability depending on the provider's network footprint.

The cable companies in Washington that offer Dark Fiber are:
- Comcast Corporation: Comcast offers extensive Dark Fiber solutions, leveraging their vast network infrastructure. They stand out with their advanced network management tools and robust security features, making them a reliable choice for businesses needing high-capacity, scalable connectivity.
- Optimum: Optimum provides high-speed fiber internet services, including 1 Gig and 8 Gig Fiber Internet plans. Their unique selling points include promotional offers like up to $800 via Prepaid Mastercard and a 60-day money-back guarantee, ensuring customer satisfaction and reliability.
Other Network Providers with Dark Fiber in Washington
Finally, a network provider delivers Dark Fiber by leveraging a mix of technologies to offer flexible, business-focused solutions. Unlike local telcos and cable companies with citywide infrastructure, these providers may only cover specific areas depending on network availability.

There are many network providers in Washington that offer Dark Fiber to choose from. Here's a quick look at all of them based on our network intelligence:
- 2pifi: Specializes in providing high-speed internet solutions tailored for businesses.
- Advanced Technology Group: Offers comprehensive IT consulting and managed services to optimize business operations.
- Allied Telecom Group: Known for delivering reliable internet and voice services to businesses in the Mid-Atlantic region.
- Altice USA: Provides a wide range of telecommunications services, including high-speed internet and digital TV.
- Angola Cables: Focuses on international connectivity solutions, including submarine cable systems.
- Arelion: Offers global connectivity services with a focus on high-performance network solutions.
- ARMSTRONG: Delivers broadband, television, and telephone services to residential and business customers.
- AT&T: Provides a comprehensive suite of telecommunications services, including mobile, internet, and enterprise solutions.
- Atlantech Online: Offers high-speed internet, voice, and data center services to businesses in the Washington, D.C. area.
- Believe Wireless: Specializes in wireless internet solutions for both residential and business customers.
- Breezeline: Provides high-speed internet, TV, and phone services with a focus on customer satisfaction.
- BullsEye Telecom: Offers a range of telecommunications services, including VoIP, internet, and managed services.
- Consolidated Communications: Delivers broadband, data, and voice services to residential and business customers.
- Cox Communications: Provides high-speed internet, digital TV, and phone services with a focus on customer service.
- Crown Castle: Specializes in infrastructure solutions, including fiber networks and small cell technology.
- CTI Towers: Focuses on providing wireless infrastructure solutions, including tower leasing and management.
- Dobson Fiber: Offers high-speed fiber internet and voice services to residential and business customers.
- Earthlink: Provides internet and online services with a focus on reliability and customer support.
- ExteNet Systems: Specializes in providing advanced network infrastructure solutions, including fiber and wireless services.
- FiberLight: Delivers high-capacity fiber optic network solutions for businesses and enterprises.
- Fusion Connect: Offers a range of cloud communications, connectivity, and managed services.
- Georgia Public Web: Provides high-speed internet and network solutions to businesses and communities in Georgia.
- Granite Telecommunications: Delivers voice, data, and networking services to multi-location businesses.
- IDT Corporation: Offers a variety of telecommunications services, including voice, data, and payment solutions.
- Lightpath: Provides high-speed fiber optic internet and networking solutions for businesses.
- Maryland Broadband Cooperative: Focuses on providing high-speed internet and network services to underserved areas in Maryland.
- MBC: Delivers high-speed broadband and fiber optic solutions to businesses and communities in Virginia.
- Megaport: Specializes in providing scalable, on-demand connectivity solutions for businesses.
- NewConnect: Offers high-speed internet and networking solutions tailored for businesses.
- Nextlink Internet: Provides high-speed internet and voice services to rural and underserved areas.
- One Ring Networks: Delivers high-speed internet, voice, and managed services to businesses and residential customers.
- PenTeleData: Offers high-speed internet, data, and voice services with a focus on reliability and customer support.
- Rise Broadband: Provides high-speed internet and voice services to rural and underserved areas.
- Segra: Delivers high-capacity fiber optic network solutions for businesses and enterprises.
- Skywire Networks: Specializes in providing high-speed internet and networking solutions to businesses.
- Sparklight: Offers high-speed internet, TV, and phone services with a focus on customer satisfaction.
- Spectrotel: Provides a range of telecommunications services, including voice, data, and managed services.
- Spectrum: Delivers high-speed internet, TV, and phone services with a focus on reliability and customer service.
- Sprint: Offers a variety of mobile, internet, and business solutions with a focus on innovation.
- Starry: Provides high-speed internet services with a focus on simplicity and customer satisfaction.
- T-Mobile: Delivers a wide range of mobile and internet services with a focus on innovation and customer service.
- Telephone and Data Systems: Offers high-speed internet, TV, and phone services to residential and business customers.
- Threshold Communications: Specializes in providing high-speed internet and networking solutions for businesses.
- TPx Communications: Delivers a range of managed IT, voice, and data services to businesses.
- Transtelco: Offers high-speed internet and networking solutions with a focus on cross-border connectivity.
- UltraTelecom: Provides high-speed internet and telecommunications services to businesses and residential customers.
- Uniti Fiber: Delivers high-capacity fiber optic network solutions for businesses and enterprises.
- Zayo: Specializes in providing high-capacity fiber optic network solutions for businesses and enterprises.
Overall Connectivity Score in Washington: High
In Washington, a high score in provider availability and fiber infrastructure means businesses have more choices and competitive pricing for Dark Fiber. However, a lower score indicates fewer options and potentially higher costs. Choosing the right provider still hinges on location-specific availability and business needs, making tools like Lightyear essential for streamlining the selection process.
Use Lightyear to Find the Perfect Provider
Interested in accessing the full list of providers at the best prices? Lightyear simplifies the process of finding the best Dark Fiber providers in Washington. Our platform offers real-time data, expert insights, and a comprehensive network intelligence to help you make informed decisions. Whether you're looking for high-capacity, scalable solutions or reliable connectivity, Lightyear has you covered. Book a demo to explore Lightyear today.