Zayo Group Holdings, Inc. (NYSE: ZAYO) is global provider of bandwidth infrastructure services, including dark fiber, colocation & interconnection, mobile infrastructure, wavelengths, Ethernet, IP services, and SONET. Its 80,000+ route mile network connects locations in and between cities on dense metro and intercity fiber assets. Zayo's network serves 319 markets in eight countries and 47 states. Zayo's fiber network connects the largest U.S. and European cities as well as many Tier 1-5 U.S. markets. Zayo's network reaches 15,794 buildings, including over 756 carrier hotels/data centers, over 650 carrier POPs, and thousands of enterprise buildings. Founded in 2007, Zayo is headquartered in Boulder, Colo., and has European headquarters in London and Paris.

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