American Tower Corporation is a holding company. The Company conducts its operations through its directly and indirectly owned subsidiaries and joint ventures. It is a wireless and broadcast communications infrastructure company that owns, operates and develops communications sites. Its primary business includes leasing antenna space on multi-tenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. This business is its rental and management operations. It also offer tower-related services domestically, including site acquisition, zoning and permitting services and structural analysis services, which primarily support its site leasing business and the addition of new tenants and equipment on its sites. In January 2012, the Company merged with and into American Tower REIT, Inc.