General Inquiries P.O. Box 15146 Wilmington, DE 19850 800.Keen.Gas
Billing Inquiries P.O. Box 15151 Wilmington, DE 19850 302.594.4562 Email: Keen Billing Department
Sales 302.594.4545 800.Keen.Gas Email: Keen Sales Department
Service 302.594.4555 Email: Keen Service Department