Zayo Group is a publicly traded company headquartered in Boulder, Colorado, with European headquarters in London. The company provides communications infrastructure services, including fiber and bandwidth connectivity, colocation and cloud services. Zayo’s primary customer segments include data centers, wireless carriers, national carriers, ISPs, enterprises, and government agencies. Zayo Group was built largely through acquisitions; it took over thirty companies from 2007 to 2014, including AboveNet and 360networks. An initial public offering of stock raised $600 million in 2014. Zayo was founded in 2007 by Dan Caruso and John Scarano. In 2007, Zayo acquired Memphis Networx, VoicePipe, Onvoy Inc, PPL Telcom and Indiana Fiber Works. In 2008, Zayo acquired Columbia Fiber Solution, Adesta Communications assets, two sets of fiber assets from Citynet, two sets of fiber assets from Northwest Telephone, and CenturyTel Regional Markets. In 2009, Zayo acquired FiberNet Telcom Group, Inc. In 2010, Zayo acquired AGL Networks, American Fiber Systems, and Dolphini’s Cummins Station data center and colocation services. In 2011, Zayo acquired MarquisNet data center business in Las Vegas, and 360networks. In 2012 Zayo acquired AboveNet, FiberGate, Arialink, US Carrier Telecom, First Telecom Services, and Maryland-based Litecast/Balticore. In 2013 Zayo acquired Austin-based data center operator Core NAP, Access Communications, Midwest-based dark fiber operator FiberLink, and Corelink Data Centers. In 2014, Zayo acquired Dallas-based data center operator CoreXchange, Neo Telecoms, and Geo Networks. In 2015, the company acquired Latisys, IdeaTek Systems and Viatel. In 2016, Zayo acquired Stream Data Center, Clearview International and Allstream, Canadas main facilities-based inter-exchange carrier which has its roots in the railway telegraph business CNCP Telecommunications. As of July 2016, Zayo has completed 39 acquisitions. On June 13, 2014, Onvoy spun off from Zayo Group Holdings. On June 16, 2014, Onvoy LLC acquired the assets of Vitelity, a voice over IP provider based in Denver, Colorado. On September 3, 2015, Onvoy LLC acquired Broadvox Communications, a competitive local exchange carrier VoIP service provider for business telecommunications.