San Diego, Headquarters (California, USA)
Email: support@itsc-group.com
Address: 7777 Alvarado Road, La Mesa, CA 91942
Mailing Address: G-TELP Service/Mail Stop #1 P.O. Box 600604 San Diego, CA 92160
Los Angeles, Center (California, USA)
Email: support@itsc-group.com
Address: 3450 Caheunga Blvd, Los Angeles, CA 90068
Mailing Address: G-TELP Service/Mail Stop #1 P.O. Box 600604 San Diego, CA 92160
Contacts for Security
For general questions or concerns related to security, please email us at security@itsc-group.com or contact our
security hotline at 1-833-949-4911 (toll free for test takers in the United States, U.S. Virgin Islands, Puerto Rico and
Canada) or +1-213-262-5671 (for test takers from other locations)
Customer Service
Phone: 1-833-949-4911 (Toll Free)/(213) 262-5671
Fax: (213) 433-4755
Email: support@itsc-group.com
Mailing Address: G-TELP Service/Mail Stop #4 P.O. Box 600604 San Diego, CA 92160
(a) G-TELP Service/Mail Stop #1 P.O. Box 600604 San Diego, CA 92160
(b) by e-mail at support@itsc-group.com
We invite all organizations and institutes to be ITSC's agency or strategic business partner.
To learn more about partnering with the ITSC, please contact us at webmaster@itsc-group.com.
※ For clearer communication, please contact us via email. Excessive phone calls can result in long wait times, which may be inconvenient.
Contact Form
Please use this form if you are a business organization looking for further information.