Please refer to the Partners page to contact a partner which is nearest to your city/country.

For upcoming test schedule, please refer to test schedule.

Should you have any other enquiry, or interested to become an ISTO partner, please contact us by e-mail at

Disclaimer: The International Standardized Testing Organization (ISTO) is a commercially - run organization. It fully supports and embraces the international standards published by standards bodies. The International Organization for Standardization (ISO) is a world-wide federation of National standards bodies based in Geneva, Switzerland. Being independent and impartial, ISTO has no formal links with any standard bodies.