For general ISDC inquiry, including registration by phone, registration processing status,
NSS membership discounts, and general information:
By Telephone: +1 202-429-1600
By Fax: +1 202-530-0659
By email, please do not include any private information like credit card numbers.
For media relations and publicity, please send an email to our
For general ISDC sponsorship, VIP speaker and management related questions, please send an email to
For website issues, including broken links and registration problems, please send an email to our
To contact us via postal mail:
National Space Society
1155 15th Street NW, Suite 500
Washington, DC 20005
Special thanks to our Sponsors, Co-Sponsors, Exhibitors, Supporters and Affiliates.