Contact Us Please contact us with any questions, comments, or feedback, and we will get back to you as soon as possible. Notice: JavaScript is required for this content. Interstate Electronics Company 600 Joliet Rd Willowbrook, IL 60527 Get Directions Interstate Electronics Company 600 Joliet Road Willowbrook, IL 60527 Phone: 630-789-8700 Fax: 630-789-8712