SBA Communications Corp. is a real estate investment trust. which engages in the provision, ownership, and provision of wireless communications infrastructures. It operates through the Domestic Site Leasing; and International Site Leasing segments. The Domestic Site Leasing segment includes AT&T, Sprint, T-Mobile, and Verizon Wireless. The International Site Leasing segment acquires and develops towers. The firm also offers site leasing and site development services. It focuses on leasing antenna space on multi-tenant towers to wireless service providers. The company was founded by Steven E. Bernstein in 1989 and is headquartered in Boca Raton, FL.