Crown Castle is a real estate investment trust (REIT) that provides shared communications infrastructure. Founded in 1994, the company is the United States' largest provider of such infrastructure, serving wireless carriers, telecommunications firms, technology companies, and other sectors including healthcare and financial institutions.
The company's portfolio comprises three core assets: approximately 40,000 cell towers, small cell networks for dense urban connectivity, and roughly 90,000 route miles of fiber optic cable. This infrastructure is deployed across the United States to support the expansion and densification of wireless networks.
As a REIT, Crown Castle's business model is centered on owning and leasing physical infrastructure assets. Its customers, primarily wireless carriers and technology companies, lease space on towers, access to small cells, and fiber capacity to build and operate their networks.






