Lumen Technologies, Inc. (formerly CenturyLink, Inc.) is headquartered in Monroe, Louisiana and operates as a public company traded on the NYSE under ticker LUMN. The company provides network, cloud, security, voice, and managed communications services to enterprise, small business, and residential customers through approximately 450,000 route miles of fiber optic and copper networks and 170,000 on-net fiber locations. Lumen's service portfolio includes SD-WAN, MPLS/IPVPN, Ethernet, dark fiber, private lines, wavelength services, cloud hosting (bare metal, private cloud, public cloud, and SaaS), IoT, DDoS protection, web application security, and unified communications and collaboration (UC&C) solutions. The company operates one of the largest and most deeply peered internet networks globally and monitors over one billion security events daily through its Lumen Security division. As of 2023, Lumen employed approximately 29,000 people and generated $14.557 billion in annual revenue, down from $22.58 billion in 2018.