Keywords: Advanced Search Directory View All Listings Utilities Sort By:Default Business Name Delmarva Power Business Name Delmarva Power Business Genre Utilities Long Business Description Delmarva Power provides safe and reliable electric service to more than 520,000 customers in Delaware and Maryland and approximately 132,000 natural gas delivery customers in northern Delaware. Business Website Address Delmarva Power Business Phone Number 800-375-7117 Business Address 2530 N. Salisbury Boulevard Salisbury, MD 21802-1739