Lumen Launches NorthLine, a Northern U.S. Fiber Route Designed for AI-Driven Data Traffic

Lumen Technologies (NYSE: LUMN) says it is expanding its network with NorthLine, a low-latency fiber route that will directly connect Seattle and Minneapolis. The company says the route, which spans approximately 2,000 route-miles, will tie into its national network, giving customers a key northern corridor between the Pacific Northwest and central U.S. markets.

NorthLine will support 100G and 400G wavelength services and will be delivered via Lumen RapidRoutes which are pre-engineered paths with validated capacity and a 20-day service-level agreement for qualified deployments. Lumen says RapidRoutes can shorten the design-to-deployment timeline and make scaling across major U.S. markets more predictable.

Lumen expects NorthLine to be available by late 2026 and says it will give enterprises, cloud providers, and AI builders a more direct path between major markets, streamlining designs and reducing dependence on piecemeal, multi-provider networks. The route follows emerging northern U.S. data-center corridors, where new power supplies are accelerating AI infrastructure growth.

With rising demand for AI-scale connectivity, Lumen says it is building routes that match today’s data flows—across clouds, between data centers, and into emerging compute regions. The company notes that traffic is increasingly moving east–west as data clusters in new markets and demand spreads beyond traditional hubs. Lumen says these trends are increasing the need for routes aligned with where compute, power, and connectivity are expanding.

“We’re doing more than adding routes; we’re building a connected national network,” comments Kye Prigg, Lumen Chief Commercial Operations Officer. “NorthLine adds a new northern path backed by the predictable, high-capacity services customers need to make infrastructure choices with confidence.”

Prigg says NorthLine is designed to scale long term, using the latest optical technology to improve fiber efficiency now while supporting future 800G and 1.6 Tbps wavelengths as AI-driven demand grows.