Lumen Technologies has expanded its fiber network infrastructure in Europe, strengthening its service capabilities in France, Switzerland and Spain. The infrastructure extends fiber reach in and between major hubs of business and finance, bringing connectivity to new cities and providing dense coverage in key areas. The Lumen network is comprised of approximately 450,000 (720,000 km) global route miles of fiber and connects to more than 180,000 on-net buildings and 2,200 public and private third-party data centers. Lumen is the foundation of the Lumen platform, a fast, secure platform for next-gen applications and data.
Source: https://www.helpnetsecurity.com/2021/07/26/lumen-fiber-network-infrastructure/