Power Grid Corporation of India Limited, an electric power transmission utility, engages in the power transmission business in India and internationally. It operates in three segments: Transmission Services, Telecom Services, and Consultancy Services. As of 31 March 2025, the company owned and operated 180,195 circuit kilometers of transmission lines, and 282 substations with an aggregate transformation capacity of 551,961 mega volt amperes. It also provides telecom services that offer overhead optic fiber network services using optical ground wire on power transmission lines under the POWERTEL brand name, as well as lease lines, MPLS-VPN, data, infrastructure, and international long-distance services. In addition, it provides consultancy services to the transmission, distribution, and telecom sectors on system planning and feasibility studies; environmental and social studies; design and engineering; contract/procurement services; project management and construction supervision; capacity building; operation and maintenance; asset management; owners' and lenders' engineer services to utilities and funding institutions; preparation of grid code, tariff mechanisms, and market analysis; legal and technical advisory in power transmission; power system studies/DPR preparation; smart grid and EV charging; load despatch and communication; sub-transmission/distribution/rural electrification services; testing and quality assurance and inspection; energy efficiency; and preventive vigilance, as well as human resource development. Further, it operates electric vehicle charging stations; and engages in solar power generation, green hydrogen production, smart metering, and data centers. The company was formerly known as National Power Transmission Corporation Limited and changed its name to Power Grid Corporation of India Limited in October 1992. Power Grid Corporation of India Limited was incorporated in 1989 and is based in Gurugram, India.