CoreSite Realty Corporation (the “Company”) (NYSE:COR), a national provider of powerful, network-rich data centers, today announced the Company will release its first quarter 2012 financial results prior to market open on Thursday, April 26, 2012, to be followed by its quarterly conference call at 12:00 p.m. (Eastern time).

The call will be accessible by dialing +1-877-407-3982 (domestic) or +1-201-493-6780 (international). A replay will be available until May 3, 2012 and can be accessed shortly after the call by dialing +1-877-870-5176 (domestic) or +1-858-384-5517 (international). The passcode for the replay is 392009.

The quarterly conference call will also be offered as a simultaneous webcast, accessible by visiting www.coresite.com and clicking on the “Investors” tab. An on-line replay will be available for a limited time immediately following the call.

About CoreSite

CoreSite Realty Corporation (NYSE:COR) is a national provider of data center products and interconnection services. More than 700 customers such as Global 1000 enterprises, communications providers, cloud and content companies, financial firms, media and entertainment, healthcare, and government agencies choose CoreSite for the confidence that comes with customer-focused data center products, service and support systems, and scalability. CoreSite data centers are business catalysts, featuring the Any2 Internet exchange and network ecosystems, which include access to 200+ carriers and service providers and a growing mesh of more than 15,000 interconnections. The company features a diverse colocation offering from individual cabinets to custom cages and private suites, with 12 data center locations in seven major U.S. markets. For more information, visit www.CoreSite.com.