CyrusOne is a data center owner, operator, and developer that manages more than 50 facilities, with its footprint concentrated in the U.S. and Europe. The company is based in Dallas and was taken private in March 2022 by funds managed by KKR and Global Infrastructure Partners in a transaction valued at approximately 15 billion dollars including debt.

Its portfolio centers on hyperscale and enterprise colocation across multi-building campuses. CyrusOne has also pursued international growth initiatives alongside its core North American and European markets.

CyrusOne History:

  • March 2022: Taken private by funds managed by KKR and Global Infrastructure Partners in an approximately 15 billion dollar all-cash transaction including debt.
  • July 2015: Acquired Cervalis, adding four data centers and two disaster recovery sites in the New York metro.
  • July 2014: Acquired Cervalis
  • January 2013: Completed initial public offering on NASDAQ as a carve-out of Cincinnati Bell’s data center business.
  • June 2010: Cincinnati Bell acquired CyrusOne for approximately 525 million dollars.
  • 2000: Founded by David Ferdman.

CyrusOne Data Center Map

CyrusOne Power Growth Over Time

+64% since 2022
Operational
Construction
Planned
Prospective
Land Bank
In Doubt
Currently Operational
across NN Request Dataset sites
Under Construction
NN Request Dataset sites currently building
Planned / Prospective
NN Request Dataset sites announced, but haven't started construction

CyrusOne Locations

CyrusOne: SAT2

San Antonio

Located near CyrusOne’s first San Antonio facility, the new site will have up to 196,000 colocation square feet (CSF) and 20,000 sq. ft. of superior Class A office space that can be used by customers.

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CyrusOne: AMS1 Bldg 1

Amsterdam

CyrusOne AMS1 Building 1 is a three-storey data center at Linieweg 1 in Halfweg's PolanenPark, built in 2019. It has six data halls, an electrical plant on each floor, A and B 20 kV incomers and about two dozen LV diesel generators.

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CyrusOne: DFW10

Dallas

The CyrusOne DFW10 data center, currently under construction in Bosque County, Texas, is a major hyperscale campus specifically engineered to meet the demands of AI-driven workloads.

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CyrusOne Allen DFW3

Dallas

The project will have three phases. The first phase of CyrusOne's planned Allen data center would be 350,950 square feet. Two additional phases would add a 619,100 square foot and a 412,800 sqft building.

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CyrusOne: DFW17A

Dallas

DFW17 is a $375 million development, with construction due to run from October 2025 until December 2026. The single-story facility will span 88,875 sq ft (8,257 sqm).

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CyrusOne: DFW17B

Dallas

CyrusOne is investing $430M into DFW17C, a 93,320-square-foot data center designed for advanced AI workloads. Construction is set to run from early 2026 through April 2027.

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CyrusOne: Lemoore, CA

Fresno

The US Navy, energy solutions provider Ameresco, and data center developer CyrusOne have partnered to develop a massive AI-optimized data center at Naval Air Station (NAS) Lemoore in California.

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CyrusOne: Yorkville 5

Chicago: Suburban

Building 11E of CyrusOne's Yorkville Technology Campus (CHI11) at Eldamain and Faxon roads in Yorkville, Illinois. A planned single-story data center of about 246,000 sq ft at the west end of the campus's south row, near Faxon Road.

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CyrusOne: Yorkville 4

Chicago: Suburban

Building 11D of CyrusOne's Yorkville Technology Campus (CHI11) at Eldamain and Faxon roads in Yorkville, Illinois. A planned single-story data center of about 246,000 sq ft in the campus's middle row, just west of the on-site substation.

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CyrusOne: Yorkville 2

Chicago: Suburban

Building 11B of CyrusOne's Yorkville Technology Campus (CHI11) at Eldamain and Faxon roads in Yorkville, Illinois. A planned single-story data center of about 129,000 sq ft, the campus's smallest building, beside Building 11A in the northwest section.

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CyrusOne: Yorkville 7

Chicago: Suburban

Building 11G of CyrusOne's Yorkville Technology Campus (CHI11) at Eldamain and Faxon roads in Yorkville, Illinois. A planned single-story data center of about 246,000 sq ft at the east end of the south row, south of the on-site substation.

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CyrusOne London I

London: Slough

CyrusOne London I (LON1) is the former Zenium London One at 12 Liverpool Road on the Slough Trading Estate: one two-storey building with about 4,300 sq m of technical space. CyrusOne acquired it with Zenium in 2018.

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CyrusOne Madrid I

Madrid

CyrusOne’s MAD1, finished in 2023, is a located in the municipality of Alcobendas. The data center will ultimately deliver 6,000 sq m (64,584 sq ft) of world-class technical space within a two-story building.

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Carrier-Neutral Data CenterInterested in this information?Contact us

Chicago: Suburban

Carrier-Neutral OperatorInterested in this information?Contact us is developing a 62-acre campus in Wood Dale, Illinois, with plans to construct six data center buildings encompassing approximately 1.4 million square feet.

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CyrusOne: DUB1 Bldg 2

Dublin

Second data centre block on CyrusOne's Grange Castle DUB1 campus (Building B under SD18A/0134), on a cleared pad east of Building 1. Permission extended in 2023; construction not started.

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CyrusOne: DUB1 Bldg 1

Dublin

First building on CyrusOne's Grange Castle DUB1 campus: a two-storey data centre with an attached three-storey office block on Conchobar Murray Avenue, built 2019-2021 by Structure Tone, with 16 standby generators and rooftop solar.

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CyrusOne: Southall LON7

London

CyrusOne has secured planning permission from Ealing Council to transform the historic former "Honey Monster Factory" site in Southall, West London, into a state-of-the-art data center campus.

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CyrusOne: Yorkville 1

Chicago: Suburban

Building 11A of CyrusOne's Yorkville Technology Campus (CHI11) at Eldamain and Faxon roads in Yorkville, Illinois. A planned single-story data center of about 246,000 sq ft in the campus's northwest section. CyrusOne plans to build it first.

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CyrusOne Frankfurt V

Frankfurt

CyrusOne has broken ground on its fifth data center in Frankfurt, FRA5. FRA5 is located in Hanau, 25km east of Frankfurt's city center.
The facility will span 18,000 sqm (193,750 sq ft) across two buildings.

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CyrusOne: Milan MIL1

Milan

CyrusOne has broken ground on its MIL1 data center at Via Reggio Emilia, 39, Segrate (Milan), Italy, a 27MW, three-storey facility delivering approximately 7,000 sqm (75,345 sq ft) of technical space. Construction began in March 2026, with the first 9MW phase expected online by Q3 2027, followed by phased expansion to full capacity.

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CyrusOne: AMS1 Bldg 2

Amsterdam

CyrusOne AMS1 Building 2 is a planned two-storey data center at Linieweg 3, directly west of Building 1 in Halfweg's PolanenPark. Noord-Holland province granted its building permit in January 2026.

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CyrusOne Allen DFW4

Dallas

The DFW4 shell & uplift project involves the company investing $31.5 million in a new single-story data center with a two-story office component. The facility measures 126,000 sq ft (11,700 sqm).

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CyrusOne: Austin III

Austin

CyrusOne's AUS3 data center is projected to be the company's largest facility in Austin, spanning 172,000 total square feet, which includes 120,000 square feet of colocation space (CSF) and over 25,000 square feet of Class A office space.

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CyrusOne Data Center Photos See all

aerial view of the CyrusOne Sterling II Data Center Near Ashburn
Source: CyrusOne
Carrollton Facility at Twilight
Source: CyrusOne
The data center was acquired in April 2016
Aurora I Facility
Source: CyrusOne

The data center was acquired in April 2016

Rendering of Aurora II
Source: CyrusOne
The buildings and next to each other
CME Campus Layout
Source: CyrusOne

The buildings and next to each other

The Carrollton Site Layout
Source: CyrusOne
London One at 12 Liverpool Road
Source: CyrusOne
Rendering of Cyrus's Third Data Center in Slough
Source: CyrusOne
Rendering of Cyrus's 3rd Data Center in Frankfurt
Source: CyrusOne
Norwalk Generators
Source: CONE
Outside of 6 Norden Place in Norwalk
Source: CONE
Lombard Site Floor Plan
Source: CyrusOne
Front of the Facility
Source: CONE
Facility at 7190 Industrial Rd in Florence
Source: CyrusOne
Facility Entrance
Source: Baxtel
CONE's facility at 155 Myers Corners Rd in Wappingers Falls
Source: CyrusOne
Long Brick Facade of the Wappingers Falls Data Center
Source: Baxtel
Site Layout in Durham
Source: CyrusOne
CONE facility at 2223 Northeast Creek Parkway in Durham
Source: Baxtel
Stack Plan at 7th Street Data Center
Source: CyrusOne
Cincinnati Bell Building was built in an Art Deco style
Source: Baxtel
CONE facility at 11500 Goldcoast Drive in Cincinnati
Source: Baxtel
Mason Facility
Source: CONE
Lebanon Floor Plan
Source: CyrusOne
Zenium branded exterior before CyrusOne rebranded the facility
Source: Baxtel
London Two, post rebranding
Source: Baxtel
Aerial Rendering of CyrusOne's third data center in FRA
Source: Baxtel
CONE FRankfurt 2 Site
Source: Baxtel
Frankfurt I Facility
Source: CyrusOne
Zenium Frankfurt One before rebranding
Source: Baxtel
Floor Layout of CyrusOne's Frankfurt II Building
Source: CyrusOne
Zenium Topping Out Ceremony of their 2nd Facility in FRA
Source: Zenium
Second Zenium Facility Under Construction
Source: Zenium
High level rendering of Dublin I facility
Source: CyrusOne
Exterior of 9500 Westover Hills Blvd in San Antonio
Source: CyrusOne
San Antonio II
Source: CyrusOne
Rendering of the proposed CyrusOne Quincy Facility
Source: Baxtel
Data Center at 9999 Westover Hills Blvd, San Antonio
Source: CyrusOne
From Left to Right: Laramie Dorris, VP Design & Construction, Kellie Teal-Guess, CPO (Chief People Officer), Gary Caplinger, Allen Mayor Pro Tem Baine Brooks, Allen City Council Member John Hatem, ...
Allen data center ground breaking in October 2017
Source: Baxtel

From Left to Right: Laramie Dorris, VP Design & Construction, Kellie Teal-Guess, CPO (Chief People Officer), Gary Caplinger, Allen Mayor Pro Tem Baine Brooks, Allen City Council Member John Hatem, EVP, Operations, Design & Construction, Allen Mayor Stephen Terrell, Robert Jackson, General Counsel, Peter Vargas, City Manager Dan Bowman, Executive Director/CEO, AEDC Danny Cowser, Director, Construction & Design

Exterior of the Massive facility
Source: Baxtel
New Colocation Room ready for a deployment (Nov 2018)
Source: CyrusOne
The building features 30,000 square feet of customer office space, a modern cafeteria, a gym area with workout machines, and unique recreation space featuring a climbing wall, circular slide and a ...
Carrollton Amenities
Source: Baxtel

The building features 30,000 square feet of customer office space, a modern cafeteria, a gym area with workout machines, and unique recreation space featuring a climbing wall, circular slide and a putting green.

Rock Climbing Wall and Putting Green
Source: CyrusOne
Rendering of CyrusOne's 4th facility in Frankfurt that was announced in July 2020
Source: CyrusOne
Rendering of CONE's newest site in Iowa
Source: Baxtel
Rendering of FRA7
Source: Baxtel
Outside of SAT5
Source: Baxtel
Campus plan
Source: Baxtel
Cyrusone Sterling IX Data Center
Source: Corgan
CyrusOne Bilter Road Campus preliminary site map
Source: Baxtel
CyrusOne Bilter Road Campus preliminary site map
Source: Baxtel
CyrusOne Dublin 1 Campus
Source: CyrusOne
CyrusOne Dublin 1 Campus
Source: cy
CyrusOne Dublin 1 Campus
Source: CyrusOne
CyrusOne Amsterdam I Campus
Source: Willemen Groep
CyrusOne NVA7 data center in Northern Virginia
Source: CyrusOne
The sitemap for the CyrusOne data center campus at Vint Hill Road
Source: Fauquier County Department of Community Development
CyrusOne's DFW6 data center
Source: Google Maps
CyrusOne's development plan for Little Rock Township Campus in Illinois
Source: City of Yorkville
CyrusOne Phoenix Campus Site Plan
Source: CyrusOne
Revised Sitemap for Cyrusone Phoenix Campus
Source: CyrusOne
CyrusOne launched Austin-3 Data Center in 2015
Source: CyrusOne
CyrusOne refiles plans for Iver campus
Source: CyrusOne
Rendering of CyrusOne MIL2 facility in Milan, Italy
Source: CyrusOne
Primary rendering of CyrusOne’s planned Wood Dale campus
Source: CyrusOne
CyrusOne is developing a campus in Talkington Township, Illinois.
Source: Google Maps
High level rendering of Dublin I facility
High level rendering of Dublin I facility
Source: CyrusOne

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