Light Source Communications (LSC) is building a 500-mile long-haul dark fiber network from St. Louis to Tulsa, providing a critical bridge in the Central U.S. supported by eight in-line amplifiers (ILAs) and anchored by a hyperscale tenant.

Construction is expected to be complete in the third quarter of 2027. It will connect to LSC’s existing Tulsa dark fiber metro ring consisting of 130 route miles. The new long-haul route will connect to data centers in St. Louis and Tulsa, and additional Points-of-Presence will be added.

“Our new St. Louis-Tulsa corridor is a strategic unlock for the Central U.S.,” said Debra Freitas, CEO of LSC. “We are building the advanced infrastructure that transformative technologies like AI and the neocloud require. This route ensures our partners have the massive, diverse capacity they need to move data at the speed of innovation as they scale their most demanding ML and HPC workloads.”

LSC solves the AI era’s core infrastructure challenges — capacity, latency, and diversity — through purpose-built dark fiber networks. By engineering every mile of its latest-generation fiber 100% underground, LSC provides the ultimate foundation for GPU-dense clusters and real-time processing. For hyperscalers and neoclouds, LSC delivers a secure, resilient, and future-proof connection that simply cannot be matched by surface-level builds.

To learn more about the St. Louis-Tulsa long-haul route, read the full announcement here.