- College Danubius DEQARINST2389 SK0008 Vysoká škola Danubius Sládkovičovo (Slovakia)
- Coleg Gwent DEQARINST9402 UK0822 Usk (United Kingdom (Wales))
- Coleg Cambria DEQARINST9403 UK0823 Wrexham (United Kingdom (Wales))
- Codarts, University for the Arts DEQARINST1733 NL0020 Codarts, Hogeschool voor de Kunsten Rotterdam (Netherlands)
- Coburg University of Applied Sciences DEQARINST0520 DE0225 Hochschule für angewandte Wissenschaften Coburg Coburg (Germany)
- Clausthal University of Technology DEQARINST0372 DE0059 Technische Universität Clausthal Clausthal (Germany)
- City University of Applied Sciences Bremen DEQARINST0557 DE0271 Hochschule Bremen Bremen (Germany)
- City Unity College Nicosia DEQARINST6625 CY0044 Nicosia (Cyprus)
- CITY College DEQARINST7711 Athens (Greece)
- Ciputra University DEQARINST8747 Universitas Ciputra Surabaya (Indonesia)
- Cihan University DEQARINST5843 Erbil (Iraq)
- CIEE Study Abroad London Ltd DEQARINST9408 UK0828 London (United Kingdom (England))
- Chulalongkorn University DEQARINST6139 จุฬาลงกรณ์มหาวิทยาลัย Bangkok (Thailand)
- Christian University College of Teacher Education Vienna/Krems DEQARINST0045 AT0047 Kirchliche Pädagogische Hochschule Wien/Krems Vienna (Austria)
- Christian Theological Academy in Warsaw DEQARINST1859 PL0046 Chrześcijańska Akademia Teologiczna w Warszawie Warszawa (Poland)
- Chongqing University of Posts and Telecommunications DEQARINST5828 重庆邮电大学 Chongqing (China, People's Republic of)
- Chongqing College of Mobile Communication DEQARINST8778 重庆移通学院 Chongqing (China, People's Republic of)
- China agricultural university DEQARINST5748 Китайский сельскохозяйственный университет Beijing (China, People's Republic of)
- Chemnitz University of Technology DEQARINST0404 DE0093 Technische Universität Chemnitz Chemnitz (Germany)
- Chelyabinsk State University DEQARINST5750 Челябинский государственный университет Chelyabinsk (Russia)