Interstate Envelope Manufacturing Corp. 56-15 55th Drive Maspeth, NY 11378 Tel: (800) 635-5554 or (718) 326-2424 Fax: (718) 894-1570 E-mail: info@interstate-envelope.com Let Interstate be your source for all of your envelope needs. Contact our customer service department via E-mail at custserv@interstate-envelope.com, or fill out the request form below: E-mail Address Your Name Title Company Address City State/Province Zip/Postal Code Country Phone Fax Please list your requirements, questions or suggestions below: