CoreSite Realty Corporation

CoreSite is a leading provider of secure, reliable, and high-performance data center and interconnection solutions, headquartered in Denver, Colorado, U.S.. The company's mission is to empower businesses with digital infrastructure, enabling interconnection, innovation, and growth within its ecosystem of data centers.

CoreSite offers a comprehensive suite of products and services, including colocation (both retail and wholesale), interconnection services, and cloud networking solutions. Key offerings include the Open Cloud Exchange® (OCX), inter-site connectivity, cross connects, blended IP, and peering exchanges like Any2Exchange®. CoreSite specializes in providing AI-ready infrastructure, featuring high-density power and advanced cooling, catering to enterprises, network operators, and various cloud providers, including hyperscalers, private cloud, and neocloud services.

In December 2021, CoreSite was acquired by American Tower Corporation for approximately $10.1 billion, becoming a wholly-owned subsidiary. Juan Font serves as the President and CEO of CoreSite and Senior Vice President of American Tower. CoreSite operates 30 data centers across 11 strategic U.S. markets, encompassing over 4.8 million square feet. The company continues to expand its capabilities, notably launching its NY3 data center in Secaucus, New Jersey, in September 2025, to enhance AI-optimized capacity in the New York metropolitan area. CoreSite was recognized as a Representative Vendor in the 2025 Gartner® Market Guide for Data Center Colocation and achieved Google Gold Verified Peering Provider status in March 2026, reinforcing its position as a leading interconnection data center platform.