- Atılım University DEQARINST2522 TR0107 Atılım Üniversitesi Ankara (Türkiye)
- Atyrau State University named after Kh.Dosmukhamedov DEQARINST3114 Х.Досмұхамедов атындағы Атырау мемлекеттік университеті Kazakhstan
- Atyrau Oil and Gas Institute DEQARINST3115 Атырау мұнай және газ институты Kazakhstan
- Atma Jaya Catholic University of Indonesia DEQARINST8746 Universitas Katolik Indonesia Atma Jaya Jakarta (Indonesia)
- Atlântico Business School DEQARINST2175 PT0114 Escola Superior de Negócios Atlântico Vila Nova de Gaia (Portugal)
- Atlântica University DEQARINST2152 PT0072 Universidade Atlântica Barcarena (Portugal)
- Atlântica High Health School DEQARINST7268 PT0148 Escola Superior de Saúde Atlântica Barcarena (Portugal)
- Atlântica - Instituto Universitário DEQARINST7267 PT0147 Barcarena (Portugal)
- Atlantis Medical College DEQARINST7070 NO0810 Norges Høyskole for Helsefag Oslo (Norway)
- Atlantis College DEQARINST4531 CY0028 Famagusta (Cyprus)
- Atlantic Technological University DEQARINST7745 IE0031 Letterkenny (Ireland)
- Atlantic Technical University DEQARINST8669 Mindelo (Cape Verde)
- Athrofa Padarn Sant/St Padarn's Institute DEQARINST9407 UK0827 Corff Cynrychiolwyr yr Eglwys yng Nghymru Cardiff (United Kingdom (Wales))
- Athenaeum University of Bucharest DEQARINST2257 RO0070 Universitatea „Athenaeum” din București Bucharest (Romania)
- Atert-Lycée Redange DEQARINST8647 Redange-sur-Atert (Luxembourg)
- Ateneum-University in Gdansk DEQARINST1857 PL0042 Akademia Ateneum w Gdańsku Gdańsk (Poland)
- Ateliers Saint-Luc (Instituts St-Luc Bruxelles) (Haute Ecole Libre de Bruxelles Ilya Prigogine (H.E.L.B.)) DEQARINST7413 BE0119 Saint-Gilles (Belgium (French Community))
- Atatürk University DEQARINST2431 TR0016 Atatürk Üniversitesi Erzurum (Türkiye)
- Aston University DEQARINST2605 UK0002 Birmingham (United Kingdom (England))
- Astana University DEQARINST3179 «Астана» университеті Kazakhstan