CoreSite Chicago CH1

427 South LaSalle Street

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CoreSite's CH1 site in downtown Chicago was acquired for $34 million in 2007 from Marc Realty. CoreSite has more than a decade upgrading the infrastructure one floor at a time. CoreSite has since finished renovating and filling the building with colocation customers and is planning their 2nd building in Chicago.


Once owned by the Western Union company, the building was formerly known as "The Telegraph Building."


The building is next to the Chicago Stock Exchange and relatively close to 350 E Cermak Carrier Hotel.

Map and Nearby Locations:

427 South LaSalle Street
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Sites within 15 miles of CoreSite Chicago CH1

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Distance Site About
0.00 miles Cogent: 427 S LaSalle
0.00 miles InfoRelay Chicago
0.00 miles 365 Chicago
The site is a former Switch and Data site (also owned by Equinix for a short period.)
0.02 miles QuadraNet Chicago
0.14 miles 600 S Federal - Digital Realty
0.14 miles Lumen Chicago 5
0.14 miles Colocation America CH2
0.14 miles Cogent: 600 S Federal
0.22 miles Netrality Chicago: 717 S Wells
The 10 story building was constructed in 1923 and eventually was converted into a data center.
0.23 miles Cogent: 216 W Jackson
0.24 miles Steadfast Chicago 725 Wells
0.24 miles Crown Castle 725 S Wells
0.24 miles Atlantic Metro ORD3
0.24 miles Colo@ Chicago
0.24 miles 725 S Wells - 1547 Critical Systems
1547 Acquired the site in December of 2018.
0.29 miles Verizon: 140 S Dearborn
0.56 miles DataBank (ORD2) 840 S Canal
0.56 miles Server Farm Realty 840 South Canal
4 MW Critical Load on Each Floor (Floors 1-5) 130-160 Watts per Raised Floor SF
0.59 miles Lumen Chicago 6
0.65 miles First Communications Chicago
0.66 miles TierPoint Chicago Polk
0.68 miles Lumen Chicago 1
0.68 miles GTT - 111 North Canal
0.71 miles Lumen Chicago 3
1.04 miles CoreSite Chicago CH2
In February 2018, CoreSite acquired a two-acre land parcel in downtown Chicago, Illinois, on which CoreSite built CH2, a greenfield development of a 175,000-square-foot, turn-key, four-story data center supporting 18 critical megawatts of power capacity. The building was completed in June 2020.
1.58 miles Lumen Chicago 4
1.66 miles Equinix Chicago CH1, CH2, & CH4
Equinix distinctly separates CH1, CH2, and CH4 into separate data centers, but in reality, the sites are in the same building.
1.66 miles Cyxtera Chicago CH4
Digital Realty Trust owns the building at 350 Cermak and is CTL's Landlord.
1.66 miles Colocation America CH1
1.66 miles Cyxtera Chicago CH2
Within DRT's Cermak carrier hotel
1.66 miles Steadfast Chicago 350 E Cermak
1.66 miles Atlantic Metro ORD0
1.66 miles 350 E Cermak - Digital Realty
1.68 miles ServerCentral Chicago DRT-CH1
1.73 miles Lumen Chicago 2
2.46 miles Metro Edge: Illinois Medical District (IMD)
3.00 miles QTS Chicago
The campus was a former Sun Times Press Facility and was acquired in 2014
5.61 miles 1547 Chicago Midway Technology Centre
11.77 miles Lumen Broadview
12.17 miles Tierpoint Chicago West
12.22 miles 9333 Grand Ave (DRT)
12.22 miles SingleHop Chicago
12.23 miles Digital Chicago Franklin Park Campus on Grand Ave - Digital Realty
Digital Chicago is a master-planned 40-acre campus in the Village of Franklin Park. The campus has 3 existing buildings, totaling 574,994 sqft
12.24 miles 9377 Grand Ave
12.25 miles 9355 Grand Ave
12.95 miles Digital Crossroad (Indiana NAP)
The facility (DX-1) is a 105,000 square foot, 20-Megawatt (MW) data center located on the former State Line Generating Plant, Hammond, IN.
13.12 miles Digital Crossroad: Hammond, IN (Phase 2)
Digital Crossroad is planning to expand its campus in Hammond, Indiana. The company plans to add another 180,000 sq ft (16,720 sqm) building and 20MW in the second phase.
14.74 miles 505 N Railroad Ave - Digital Realty
The Digital Chicago Campus covers 21 acres of land with access to major fiber networks and can support up to 8 MW of IT load at N+1 redundancies.
14.92 miles Aligned Chicago ORD-01
Aligned's ORD-01 data center is a state-of-the-art facility located in Northlake, IL, just outside of downtown Chicago. At full build, Aligned’s Chicago campus covers 520,000 sq. ft. and offers ~72 MW of critical load.
14.95 miles Aligned ORD-02
Aligned's ORD-02 is a data center located in Northlake, IL near downtown Chicago. Part of Aligned's 18.5-acre hyperscale campus, ORD-02 offers exceptional connectivity at the convergence of over 12 metro/long-haul networks. At full build, ORD-02 building will provide 36MW of critical load capacity expandable to ~52 MW.
14.97 miles DataBank (ORD4) Oak Brook
14.97 miles Verizon: Swift Dr
14.97 miles LexusNexis Oak Brook
15.13 miles Microsoft Chicago Northlake
15.19 miles T5 Northlake IL
15.84 miles Iron Mountain Chicago
First announced in 2018, the former Hart Schaffner Marx suit factory started construction in 2024.
15.99 miles Server Farm Oak Brook
The campus was originally built as the corporate headquarters of the Chicago Bridge & Iron Company (CB&I).
15.99 miles Verizon: (Oak Brook)
15.99 miles US Signal Oakbrook
800a 480V 3 phase 450kW diesel generator with 24 hour run time at full load 500kVa UPS capacity with battery backup
16.11 miles NYI Chicago (Oak Brook)
18.11 miles Equinix Chicago CH7
18.46 miles Element Critical CH1
Element Critical acquired the site in January 2019 from Sungard. The facility was previously known as SunGard Wood Dale (711).
18.49 miles Element Critical CH2
Element Critical acquired the site in January 2019 from Sungard. The facility was previously known as SunGard Wood Dale (341).
18.54 miles EdgeConneX CHI01
18.54 miles Edgeconnex Chicago Campus
The first Chicago site was leaked to the press in Oct 2016. Microsoft is expected to be the anchor tenant with the site supporting up to 25-30 MWs.
18.59 miles Cyxtera Elk Grove CH3
Cyxtera's CH3 Elk Grove site is across the street from the Digital Realty Chicago campus (former Dupont Fabros) and close to Equinix CH3.
18.64 miles Stream Chicago I
18.64 miles EdgeConneX CHI02
18.68 miles 2299 Busse (CH2) Digital Realty
18.74 miles Equinix Chicago CH3
18.83 miles Stream Chicago II
Stream Data Centers' Chicago II data center in Elk Grove Village, Illinois is a 226,000 square foot facility.
18.85 miles Rackspace Elk Grove ORD1
18.85 miles 2200 Busse Rd (CH1) DRT
18.87 miles Digital Elk Grove Village Campus
Digital Realty Trust's Chicago campus is massive and is split among 3 buildings. The campus was acquired from Dupont Fabros in September 2017.
18.87 miles ServerCentral CH1
18.87 miles HostPapa CH1
Formerly known as "ColoCrossing CH1"
18.97 miles 1450 E Devon Ave (CH3) DRT
19.35 miles STACK Chicago CHI01
19.43 miles Skybox Chicago I
19.45 miles STACK CHI01B
STACK INFRASTRUCTURE CHI01B Chicago Data Center is located at 1441 Touhy Avenue, Elk Grove Village, IL, which currently offers 24 MW of critical power and 221,000 square feet of space.
19.45 miles 360TCS-Lombard
19.45 miles Digital Fortress: Chicago Lombard
19.53 miles CoreWeave: US Central ORD1
19.72 miles CenturyLink: Arlington Heights
19.73 miles CloudHQ Mount Prospect ORD3
19.80 miles Prime Elk Grove

CoreSite Chicago CH1 Data Center Photos

427 S LaSalle: 1st Floor Layout

427 S LaSalle: 5th Floor Layout
Source: CoreSite

427 S LaSalle: 6th Floor Layout
Source: CoreSite

Western Union Building with Chicago Board of Trade in the Background

CH1 Entrance to "The Telegraph Building"
Source: CoreSite

Operating Company

CoreSite Realty is a data center REIT with a focus on network dense buildings. The company operates the Any2 Peering Exchange, which is the largest Internet Exchange in the Western US.

CoreSite History

CoreSite Realty Corporation was founded in 2001 as CRG West, a portfolio company of The Carlyle Group. CRG West initially started with two data center buildings; One Wilshire in Los Angeles and 55 South Market in San Jose. The buildings were popular network interconnection and peering points. Although 55 S Market has declined as an interconnection point, One Wilshire continues to be a popular building for network interconnection.

2007: Sold the Company's Jewel to Fuel Expansion

In August, the company sold the One Wilshire Building to Hines REIT for $287 million. The large transaction gave CRG West additional capital to fund the company's growth into new markets.

In May, CRG West acquires buildings in Chicago (for $34 million) and Sommerville just outside of Boston. The Chicago building at 427 S LaSalle was originally designed and built by Western Union. Western Union buildings have traditionally been converted into Carrier Hotels because the telegraph infrastructure with their risers of conduits works well for the telecom industry. The facility is situated across from One Financial Plaza and adjacent to the Chicago Board of Trade.

CoreSite Boston at 70 Innerbelt Road, Somerville, MA is located less than two miles from downtown Boston and Cambridge. The large building has SunGard and Internap as significant tenants also offering colocation

2008: Added Reston

CRG West acquired their Reston facility at 12100 Sunrise Valley.

2009: Rebranded

CRG West rebranded as CoreSite.

2010: IPO added More Capital to Expand

In September, CoreSite became publicly traded on the New York Stock Exchange (NYSE: COR). The Carlyle Group still owned ~50% of the newly public company at the time of the IPO. The Carlyle Group has since reduced their ownership to less than 30%.

2012 Added Denver

In April, CoreSite acquired Comfluent and their two Denver data centers. The data centers were small, but pivotal to the Denver Interconnection and Peering Market. DE1 is located in 910 15th Street, Denver's Telecom Hotel, the Denver Gas & Electric Building (DGEB.) Comfluent was the defacto meet me room for the building. DE2 was 639 E 18th Ave, which was adjacent to Level 3's Denver Gateway site.

CoreSite was headquarted in Denver, but until 2012 did not have any data centers in Colorado.


SV5 was built and leased to a single tenant

2014: New Buildings

  • VA2 launched with an initial build of 50,000 of 198,000 sqft
  • NY2 launched with an initial build of 65,000 of 283,000 sqft

2016: Change at the Top

Tom Ray, CoreSite's CEO since inception retired. Paul Szurek became CoreSites new CEO.

In August, Sunrise Technology Park (STP) was acquired for $60 million with a plan to significantly expand the campus.

Reston Campus Expansions

12100 Sunrise Valley was first acquired in 2008 and CoreSite has since turned the Reston site into a campus. The company constructed a building (VA2) in the parking lot. In 2018, Coresite acquired a 22-acre lot a few blocks away at 12379 Sunrise Valley Drive. The lot will serve to virtually expand the Reston Campus.

The development has four phases and involves building new 3-story data centers and demolishing the old buildings. CoreSite has begun work on VA3 on the new lot.

27 Facilities Owned
10 Markets Served
253.0 Megawatts
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Name Date Added Description
ch1-facility-slick-15 December 2018

PDF Data Sheet of CH1