CESC is an integrated electrical utility company involved in the generation and distribution of electrical power. The company operates thermal and solar power plants and distributes electricity to domestic, industrial, and commercial users across its licensed areas, primarily in Kolkata and Howrah, West Bengal, and through subsidiaries and franchises in other Indian states. CESC was established as the Calcutta Electric Supply Corporation in 1899 and is headquartered in Kolkata, India.