List of NRENs that are TCS members
| NREN | Approximate connected organisations | |
|---|---|---|
| 1 | ACOnet | 140 |
| 2 | AMRES | 214 |
| 3 | ANA | 48 |
| 4 | ARNES | 103 |
| 5 | AUB (American University Beirut) | unknown |
| 6 | BELNET | 102 |
| 7 | CARNET | 521 |
| 8 | CESNET | 346 |
| 9 | CYNET | 17 |
| 10 | DEIC | unknown |
| 11 | EENET Estonian Education and Research Network | 57 |
| 12 | FCT I.P. National Foundation for Scientific Computing | 67 |
| 13 | FUNET CSC – IT Center for Science Ltd. | 68 |
| 14 | GARR Italian Research and Education Network | 577 |
| 15 | GRNET Greek Research and Technology Network | 138 |
| 16 | HEANET HEAnet Ltd | 55 |
| 17 | IUCC Israel InterUniversity Computation Center | 16 |
| 18 | LITNET Information Technology Development Institute of Kaunas University of Technology | 202 |
| 19 | KIFU Former NIIF/HUNGARNET -> KIFU | 98 |
| 20 | MARWAN Ministère de l'Enseignement Supérieur de la Recherche Scientifique et la Formation des Cadres - Morocco | unknown |
| 21 | OMREN Oman Research and Education Network | unknown |
| 22 | PSNC Institute of Bioorganic Chemistry, Polish Academy of Sciences – Poznań Supercomputer and Networking Center | 424 |
| 23 | RedIRIS Entidad pública empresarial Red.es | 372 |
| 24 | RENATER GIP RENATER | 1168 |
| 25 | RENAM Research and Educational Networking Association of Moldova | 39 |
| 26 | RESTENA Reseau Teleinformatique de l'Education Nationale et de la Recherche | 73 |
| 27 | RoEduNet Agency ARNIEC / RoEduNet | 146 |
| 28 | SANET Slovak Academic Network Association | unknown |
| 29 | SUNET Swedish University Computing Network | unknown |
| 30 | SURFNET SURFnet bv | 161 |
| 31 | UNI-MALTA University of Malta | unknown |
| 32 | UNINETT UNINETT AS | 80 |