AT&T “has topped Vertical Systems Group’s US fibre lit buildings leaderboard for the third consecutive year.” Crown Castle, along with Verizon, Spectrum Enterprise, CenturyLink, Comcast, Cox, Frontier, Zayo, Altice USA and Windstream were listed as the companies with the most fibre lit buildings. Research for the rankings found that while the majority of large and medium size commercial buildings in the US are fibre lit with one or more providers, relatively few small multi-tenant buildings are fibre connected.