- CY Tech DEQARINST1156 FR0274 Cergy (France)
- CY Cergy Paris University DEQARINST7596 FR0366 CY Cergy Paris Université Cergy (France)
- Cusanus Hochschule Bernkastel-Kues (Priv. FH) DEQARINST4550 DE0472 Bernkastel-Kues (Germany)
- CUNEF Universidad, School of Engineering DEQARINST8551 Escuela Politécnica Superior Madrid (Spain)
- CUNEF Universidad, School of Business, Economics and Law DEQARINST8552 Facultad de Empresa, Economía y Derecho Madrid (Spain)
- CUNEF Universidad, Graduate and International Business School DEQARINST8550 Escuela de Postgrado y Negocios Internacionales Madrid (Spain)
- Cukurova University DEQARINST2447 TR0032 Çukurova Üniversitesi Adana (Türkiye)
- Croatian Catholic University, Zagreb DEQARINST1300 HR0039 Hrvatsko katoličko sveučilište, Zagreb Zagreb (Croatia)
- Crisis Management State Academy of RA DEQARINST2893 ՀՀ Ճգնաժամային կառավարման պետական ակադեմիա Armenia
- Cracow University of Economics DEQARINST1957 PL0185 Uniwersytet Ekonomiczny w Krakowie Kraków (Poland)
- Côte d'Azur University DEQARINST7594 FR0364 Université Côte d'Azur Nice (France)
- Coventry University Kazakhstan DEQARINST9425 Astana (Kazakhstan)
- Coventry University DEQARINST2632 UK0030 Coventry (United Kingdom (England))
- Coursera DEQARINST8785 Mountain View (United States)
- Cours pour éducateurs en fonction DEQARINST7458 BE0164 Liège (Belgium (French Community))
- Cours industriels DEQARINST7399 BE0105 Brussels (Belgium (French Community))
- Cours de promotion sociale Saint-Luc DEQARINST7451 BE0157 Liège (Belgium (French Community))
- Cosinus Higher School in Łódź DEQARINST4736 PL0266 Wyższa Szkoła COSINUS w Łodzi Łódź (Poland)
- Corvinus University of Budapest DEQARINST1301 HU0001 Budapesti Corvinus Egyetem (CORVINUS) Budapest (Hungary)
- Cornerstone Centre for Intercultural Studies DEQARINST8614 Beugen (Netherlands)