I-15 Diamond Gateway Chamber of Commerce12778 Rancho Penasquitos Blvd. #BSan Diego, CA 92129Phone: 858-484-2800Fax: 858-484-2155Email: info@dgchamber.orgWebsite: http://dgchamber.orgContact: Office Manager: Arleen Garcia: Tel: (858) 484-2800: Fax: (858) 484-2155: Email: info@dgchamber.orgEstablished: 1991: Number of members: 425: International services?: Yes