CoreSite
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CoreSite is a colocation and interconnection provider, owned by American Tower Corporation, that leases physical rack, cage, and wholesale space in its own data centers to network operators, cloud providers, and enterprises rather than selling any cloud compute of its own. As of 2025-2026 the company describes itself as owning and operating roughly 30 data centers totaling more than 4.8 million square feet across 11 strategic U.S. markets, including flagship campuses in Northern Virginia (Reston), the New York/New Jersey metro, Silicon Valley, Los Angeles, Chicago, Denver, and newer additions in Atlanta, Orlando, Washington D.C., Miami, and the Boston area. Its distinguishing feature is density of interconnection: many of its buildings, such as 32 Avenue of the Americas in Manhattan, One Wilshire in Los Angeles, and 427 South LaSalle in Chicago, are historic carrier-hotel-style facilities that anchor major peering and cloud-exchange ecosystems, tied together by its Open Cloud Exchange software-defined networking platform for direct connections into major cloud providers.
CoreSite has a confirmed data center presence at the following locations:
FACILITY OPERATOR
CoreSite Data Center Locations
- Los Angeles, California, USA LA1 TIER III CARRIER-NEUTRAL PENDING REVIEW
The CoreSite Los Angeles Data Center at 900 N. Alameda has been identified as a Tier III facility. - San Jose, California, USA SV1 San Jose Silicon Valley Data Center CARRIER-NEUTRAL PENDING REVIEW
SV1 traces back to the original MAE West interconnection point at 55 South Market Street, one of the internet's earliest major peering hubs. - Santa Clara, California, USA SV3 / SV9 PENDING REVIEW
CoreSite opened its ninth Santa Clara data center, SV9, in 2025, expanding its Silicon Valley campus footprint. - Denver, Colorado, USA DE3 Denver Data Center TIER II PENDING REVIEW
One CoreSite Denver facility at 639 East 18th Avenue has been described as a Tier 2 colocation site with a non-raised floor design. - Washington, District of Columbia, USA DC2 Washington DC Data Center PENDING REVIEW
- Doral, Florida, USA MI2 Miami Data Center PENDING REVIEW
CoreSite's Miami-area facility at 2100 Northwest 84th Avenue in Doral is built to withstand Category 5 hurricanes and serves as a gateway for connectivity to South America. - Orlando, Florida, USA OR1 Orlando Data Center PENDING REVIEW
CoreSite's Orlando campus sits on 16 acres and offers internet exchange access reaching South America. - Atlanta, Georgia, USA AT1 Atlanta Data Center PENDING REVIEW
AT1, located at 55 Marietta Street NW, is cited as the second most interconnected building in downtown Atlanta. - Marietta, Georgia, USA AT2 Atlanta Data Center PENDING REVIEW
AT2 in Marietta was integrated into CoreSite's portfolio in 2022 as part of American Tower's asset transfer, adding to Atlanta-area capacity. - Chicago, Illinois, USA CH1 Chicago Data Center CARRIER-NEUTRAL PENDING REVIEW
CH1 occupies a former Western Union building at 427 South LaSalle Street, a structure historically converted into a carrier hotel due to its legacy telegraph conduit infrastructure. - Somerville, Massachusetts, USA Boston Data Center PENDING REVIEW
CoreSite's Boston-area facility in Somerville was acquired in the company's early expansion beyond its original Los Angeles and San Jose sites. - Secaucus, New Jersey, USA NY2 Secaucus Data Center PENDING REVIEW
NY2 at 2 Emerson Lane serves as CoreSite's highly scalable extension of its New York metro campus. - New York, New York, USA NY1 New York Data Center TIER III CARRIER-NEUTRAL PENDING REVIEW
32 Avenue of the Americas is a long-established, highly connected colocation building in Manhattan with easy access to other major carrier hotels like 60 Hudson and 111 8th Avenue. - Reston, Virginia, USA Northern Virginia Campus (VA1-VA3) PENDING REVIEW
CoreSite's Reston campus comprises three interconnected data centers exceeding 986,000 square feet, positioning it among the larger clusters in the Northern Virginia data center market.
By Continent
Common Questions
Does CoreSite sell its own cloud computing service?
No. CoreSite is a colocation and interconnection provider; it sells physical rack, cage, and wholesale space plus connectivity products like its Open Cloud Exchange, which give customers direct network access into third-party clouds such as AWS and Azure, rather than selling compute or storage capacity of its own.
How many markets and data centers does CoreSite operate?
As described on CoreSite's own site, the company owns and operates 30 data centers totaling more than 4.8 million square feet across 11 strategic U.S. markets, though independent trackers cite slightly different counts (e.g., 27-35 facilities across 8-12 markets), reflecting the difficulty of counting individual buildings within multi-building campuses.
Who owns CoreSite?
CoreSite was founded in 2001 as CRG West under The Carlyle Group, rebranded as CoreSite in 2009, went public on the NYSE in 2010, and was acquired by American Tower Corporation in November 2021, continuing to operate under the CoreSite name.
Where is CoreSite's most recently opened facility?
According to industry tracker Baxtel, CoreSite opened its ninth Santa Clara data center, SV9, in Silicon Valley in 2025.
Does CoreSite operate an AI data center in ?
As of now, we don't have a confirmed AI-optimized (GPU-dense, liquid-cooled) facility on file for CoreSite here. We continue tracking new developments.
Does CoreSite offer colocation services?
Yes — we've identified 14 facilities where CoreSite may offer colocation services. Please contact CoreSite directly to confirm current availability and terms.
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