SBA Communications Corporation owns and operates wireless communications towers in the United States, Canada, Costa Rica, El Salvador, Guatemala, Nicaragua, Panama, and Brazil. The company leases antenna space primarily to wireless service providers on towers and other structures that it owns, manages, or leases from others. As of December 31, 2012, it owned 17,491 tower sites. The company also managed or leased approximately 4,800 actual or potential communications sites. In addition, it provides various site development services comprising network pre-design; site audits; identification of potential locations for towers and antennas; support in buying or leasing of the location; assistance in obtaining zoning approvals and permits; tower and related site construction; antenna installation; and radio equipment installation, commissioning, and maintenance. SBA Communications Corporation was founded in 1989 and is headquartered in Boca Raton, Florida.