Head Office
100 Constellation Way
Baltimore, MD, 21202
United States

Customer Service
Phone: 1-877-997-9995 (general)
Phone: 1-888-555-1212 (residential)
Phone: 844-6-ENERGY (business)
Phone: 1-800-785-4373 (payment)
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About Constellation
constellation customer serviceConstellation is an energy company founded in the year 1816. Headquartered in Baltimore, Maryland, the company provides power, natural gas and renewable energy to homes and businesses. It currently serves some 2 million residential and business customers. Operating about 78 generating units, Constellation delivers electricity and natural gas through the Baltimore Gas and Electric Company (BGE). Its other brands include Constellation Electric, Constellation NewEnergy, Constellation NewEnergy – Gas, StarTex Power and ONEOK Energy Marketing. Constellation merged with Exelon in 2012.

One of the three top retail natural gas suppliers in the US, Constellation currently serves residents in California, Colorado, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, Massachusetts, Michigan, Nebraska, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Texas, Virginia, Washington DC and Wyoming.

Constellation has a wide range of products and services designed for small and large businesses. Residential customers can sign up on the website to view/pay bills, manage account and schedule recurring payment. Payment of bills can be made using credit/debit cards online, by check or through direct withdrawal from bank account. Select the Automatic Bank Draft for pre-authorized payments. For more information or queries on bills, payment, services, or others, reach the Constellation customer service via phone or email.

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Last Update: September 18, 2024