Zayo is a privately maintained company. It was established in 2006. Their head office is in Boulder, Colorado, with European headquarters in London. They provides carrier-neutral colocation and fiber-based bandwidth infrastructure services and. Their primary customer parts contain wireless carriers, data centers, ISPs, national carriers, government agencies and enterprises. It is a global provider of lit and dark fiber, carrier-neutral collocation, IP services and interconnection. Their network helps 218 markets in 45 states and 7 countries and Washington D.C. Their fiber network connects the largest U.S. and European cities also several Tier 2-5 U.S. markets. Their bandwidth infrastructure services are used by wire line and wireless carriers, governments, content and media companies, and high-bandwidth enterprises, like education, healthcare, logistics, financial services, technology and other industries.