FiberTower Corporation provides facilities-based backhaul and premise access services to wireless carriers, government, and enterprise markets in the United States. It provide backhaul services by utilizing its wireless spectrum assets and fiber relationships to construct and operate high-coverage, high-capacity hybrid microwave and fiber networks. The company provides carrier-grade connectivity over its licensed spectrum to enterprises located in on-net and off-net buildings. It offers transport services based on various protocols, such as time division multiplexing (TDM), SONET, and Ethernet. As of March 31, 2010, the company provided services to 6,207 billing customer locations at 2,776 billing sites in 13 markets, including Atlanta, Boston, Chicago, Cleveland, Dallas/Fort Worth, Denver, Detroit, Houston, New York/New Jersey, Pittsburgh, San Antonio/Austin/Waco, Washington DC/N. Virginia/S. Maryland, and West Florida. FiberTower Corporation is headquartered in San Francisco, California.