The network includes more than 40,000 mobile phone antennas and nearly 80,000 miles of fiber optics that support small cells and fiber optic solutions. Previously, in 2014, the company purchased the 24/7 Mid-Atlantic Network with more than 800 miles of fiber optic along the east coast of the United States.  The company, headquartered in Houston, Texas, has 100 branches across the country.  In 2017, Crown Castle was ranked Best Places to Work by the Houston Business Journal.  On August 31, 2004, Crown Castle completed the sale of its UK subsidiary Crown Castle UK to National Grid Transco plc for more than $2 billion.   National Grid Transco plc was renamed National Grid plc in July 2005, while Crown Castle UK was renamed National Grid Wireless in October 2005. . .