New data from Synergy Research Group shows that just 20 metro areas around the world account for 59% of worldwide colocation revenues.
This includes both retail and wholesale revenue.
Ranked by revenue generated in Q3 2017, the top five metros are Tokyo, Shanghai, Washington, New York and London, with those five metros alone accounting for 26% of the worldwide market.
Across these metros, retail colocation accounted for 72% of Q3 revenues and wholesale 28%.
In Q3 Equinix was the market leader by revenue in eight of the top 20 metros and Digital Realty would be the leader in five more if a full quarter of the acquired DuPont Fabros operations were included in its numbers.
Other colocation operators that featured heavily in the top 20 metros include 21Vianet, @Tokyo, China Telecom, CoreSite, CyrusOne, Global Switch, Interxion, KDDI, NTT, SingTel and QTS.
Top 20 metros with annualized growth rates of 15% or more (measured in local currencies) were Shanghai, Beijing, Hong Kong and Washington/Northern Virginia.
Over the last four quarters colocation revenue growth in the top five metros outstripped growth in the rest of the world by two percentage points, so the worldwide market is slowly being concentrated more in those key metro areas.
All four metros saw strong growth in both the retail and wholesale segments of the market, though growth in wholesale tended to be higher.
Chicago also saw very strong growth in wholesale revenues, though in this metro retail colocation growth was relatively weak.
Synergy Research Group's chief analyst and research director, John Dinsdale, comments, “While we are seeing reasonably robust growth across all major metros and market segments, one number that jumps out is the wholesale growth rate in the Washington/Northern Virginia metro area.”
“It is by far the largest wholesale market in the world and for it to be growing at 20% is particularly noteworthy.
“The broader picture is that data center outsourcing and cloud services continue to drive the colocation market, and the geographic distribution of the world's corporations is focusing the colocation market on a small number of major metro areas.