American Tower Corporation's towers

 Wireless service providers, broadcasters, and other communication companies lease space on American Tower Corporation's towers. [1]

Major Tenants

AT&T
Verizon Wireless
T-Mobile
Broadcasters and private industries (leasing antenna and equipment space) [1, 2, 3, 4]

How It Works

American Tower acts as the landlord, owning the physical steel structures and leasing the underlying land.
Carriers and tenants mount their own antennas, transceivers, and networking gear onto the towers to transmit wireless signals to customers.
Colocation allows multiple different network operators to share the same single tower structure to reduce costs and build out coverage. [1, 2, 3]