Hydro One Networks Inc is a Canadian electricity transmission and distribution service provider. The company serves approximately 1.4 million customers across Ontario and owns and operates approximately 30,000 km of high-voltage transmission lines and 123,000 km of low-voltage distribution lines. Hydro One Networks Inc was formerly known as Hydro One Inc and changed its name to Hydro One Networks Inc in 2015. The company was founded in 1999 and is headquartered in Toronto, Canada.