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- 100 Constellation Way
- Baltimore, Maryland, United States
- Industry Energy / Oil
- Website www.constellation.com
- Phone 1-866-237-7693
- About Constellation, an Exelon company, is a leading competitive supplier of power, natural gas and energy products and services for homes and businesses across the United States and Canada. Constellation provides integrated energy solutions that help customers buy, manage and use energy, from electricity and natural gas procurement to renewable generation and conservation.