Duke Energy is a US based public company of utility services that began its journey in 1900 as the Catawba Power Company. The company specializes in commercial power, power generation, natural gas distribution and power delivery. It provides energy to approximately 5.7 million customers in all over the world. It is the largest provider of electric utility companies in the world. The total energy generation capacity of the company is approximately 58,200 megawatts. The company has been listed among the Fortune 250 companies. As per 2013 records, the company has more than 29,250 employees globally. The company also supplies natural gas services in Ohio and Kentucky. The head office of the company is located in Charlotte, North Carolina, United States. Duke Energy's services area spread in 270,000 square kilometer with 402,700 kilometer of distribution lines. Duke Energy has received many awards such as EEI Advocacy Excellence Award, Platts Industry Leadership Award, INROADS Corporate Plus Award and GPA Safety Improvement Award. The postal and official address, email address and phone number (helpline) of Duke Energy service center is given above. The helpline of Duke Energy service center may or may not be toll free.