CoreSite Extends Data Center Lease Agreement In Denver

            CoreSite Extends Data Center Lease Agreement In Denver

Customers continue to benefit from key interconnection hub located in Rocky
Mountain Region

PR Newswire

DENVER, Aug. 19, 2013

DENVER, Aug. 19, 2013 /PRNewswire/ --CoreSite Realty Corporation (NYSE: COR),
a premier provider of network-dense, cloud-enabled data center solutions and
the CoreSite Mesh, today announced that it has extended the term of its lease
and expanded its capacity at DE1 (910 15^th Street, Denver, Colorado).
CoreSite's DE1 facility is among the most interconnected facilities in the
Rocky Mountain region and a growing component of the CoreSite Mesh. Supporting
the Mesh in Denver, CoreSite operates Any2 Denver, the largest peering
exchange in the region's strategic and growing interconnection market,
providing direct access to over 25 networks.

In addition to providing CoreSite with contractual rights to control its lease
term into 2024, CoreSite secured the ability to further scale customer
requirements with additional power capacity. From its Denver campus, comprised
of DE1 and DE2 (639 East 18^th Avenue), CoreSite provides its customers with a
strong combination of capacity, connectivity, community and customer service.
The new agreement ensures that Denver-based customers will have the
opportunity to continue to benefit from and scale with the CoreSite customer
experience.

"We are pleased to execute the agreements supporting additional growth in the
Denver market," said Tom Ray, CEO at CoreSite. "We look forward to further
enabling our customers in the region to propel revenue growth through expanded
capacity, connectivity and extensive communities of networks, cloud service
providers, content organizations and enterprises."

About CoreSite
CoreSite Realty Corporation (NYSE: COR) is the data center provider chosen by
more than 750 of the world's leading carriers and mobile operators, content
and cloud providers, media and entertainment companies, and global enterprises
to run their performance-sensitive applications and to connect and do
business. CoreSite propels customer growth and long-term competitive advantage
through the CoreSite Mesh by connecting the Internet, private networking,
mobility, and cloud communities within and across its 14 high-performance data
center campuses in eight markets in North America. With direct access to 275+
carriers and ISPs, over 180 leading cloud and IT service providers, intersite
connectivity, and the nation's first Open Cloud Exchange that provides access
to thousands of lit buildings and multiple key cloud on-ramps, CoreSite
provides easy, efficient and valuable gateways to global business
opportunities. For more information, visit www.CoreSite.com.

Forward Looking Statements
This press release may contain forward-looking statements within the meaning
of the federal securities laws. Forward-looking statements relate to
expectations, beliefs, projections, future plans and strategies, anticipated
events or trends and similar expressions concerning matters that are not
historical facts. In some cases, you can identify forward-looking statements
by the use of forward-looking terminology such as "believes," "expects,"
"may," "will," "should," "seeks," "approximately," "intends," "plans," "pro
forma," "estimates" or "anticipates" or the negative of these words and
phrases or similar words or phrases that are predictions of or indicate future
events or trends and that do not relate solely to historical matters.
Forward-looking statements involve known and unknown risks, uncertainties,
assumptions and contingencies, many of which are beyond CoreSite's control,
that may cause actual results to differ significantly from those expressed in
any forward-looking statement. These risks include, without limitation: the
geographic concentration of CoreSite's data centers in certain markets and any
adverse developments in local economic conditions or the demand for data
center space in these markets; fluctuations in interest rates and increased
operating costs; difficulties in identifying properties to acquire and
completing acquisitions; significant industry competition; CoreSite's failure
to obtain necessary outside financing; CoreSite's failure to qualify or
maintain its status as a REIT; financial market fluctuations; changes in real
estate and zoning laws and increases in real property tax rates; and other
factors affecting the real estate industry generally. All forward-looking
statements reflect CoreSite's good faith beliefs, assumptions and
expectations, but they are not guarantees of future performance. Furthermore,
CoreSite disclaims any obligation to publicly update or revise any
forward-looking statement to reflect changes in underlying assumptions or
factors, of new information, data or methods, future events or other changes.
For a further discussion of these and other factors that could cause
CoreSite's future results to differ materially from any forward-looking
statements, see the section entitled "Risk Factors" in CoreSite's most recent
annual report on Form 10-K, and other risks described in documents
subsequently filed by CoreSite from time to time with the Securities and
Exchange Commission.

SOURCE CoreSite Realty Corporation

Website: http://www.coresite.com
Contact: Jeannie Zaemes, CoreSite Marketing Senior Director, 720-446-2006,
866-777-CORE, Jeannie.Zaemes@CoreSite.com