Zayo Group Holdings, Inc., through its subsidiaries, provides bandwidth infrastructure solutions for the communications industry in the United States and Europe. The company operates in three segments: Physical Infrastructure, Cloud and Connectivity, and Other. The Physical Infrastructure segment provides dark fiber, fiber-to-the-tower and small cell mobile infrastructure, and colocation and interconnection services for carriers and other communication service providers, Internet service providers, wireless service providers, media and content companies, large enterprises, and other companies. The Cloud and Connectivity segment offers bandwidth infrastructure solutions comprising wavelength, Ethernet, Internet protocol, SONET, and cloud services through its metro, regional, and long-haul fiber networks for carriers, financial services companies, healthcare, government institutions, education institutions, and other enterprises. The Other segment provides network and technical resources to customers in designing, acquiring, and maintaining their networks. The company was founded in 2007 and is headquartered in Boulder, Colorado.