Founded in 1920, PPL Corporation is an energy and utility holding company involved in the generation, transmission, and distribution of electricity primarily in the northeastern and western portions of the United States. The company serves approximately 5.1 million customers in Pennsylvania, the United Kingdom and Latin America. The company also distributes natural gas and propane to more than 100,000 customers in Pennsylvania, Maryland and Delaware. In addition, PPL offers fiber optic services, including point-to-point data transport, high-speed connections among various sites, and access to national and global fiber networks, as well as provides engineering, construction, and site leasing services to wireless carriers. The company also operates approximately 20 coal, natural gas and oil, nuclear and hydro plants in Pennsylvania, Montana, Arizona, Maine, Illinois, Connecticut and New York. PPL Corporation is headquartered in Allentown, Penn.