| AS6799 | Ote SA (Hellenic Telecommunications Organisation) | isp | 1,958,912 | 
| AS3329 | VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA | isp | 1,106,944 | 
| AS1241 | Forthnet | isp | 609,280 | 
| AS25472 | Nova Telecommunications & Media Single Member S.A | isp | 338,944 | 
| AS29247 | Ote SA (Hellenic Telecommunications Organisation) | isp | 247,552 | 
| AS5408 | National Infrastructures for Research and Technology S.A. | education | 246,016 | 
| AS12361 | VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA | isp | 91,136 | 
| AS8248 | Computer Technology Institute and Press "Diophantus" | isp | 77,824 | 
| AS3260 | INTRACOM S.A. TELECOM SOLUTIONS | hosting | 66,560 | 
| AS8762 | Hellenic Mediterranean University | education | 66,048 | 
| AS8522 | Foundation of Research and Technology Hellas | education | 65,792 | 
| AS6867 | University of Crete | education | 65,792 | 
| AS5470 | AUTH-NET-AS | business | 65,792 | 
| AS8278 | Technical University of Crete | education | 65,536 | 
| AS47616 | Center for Research and Technology Hellas (CERTH) | education | 65,536 | 
| AS3323 | National Technical University of Athens | education | 65,536 | 
| AS2546 | Ariadne-t Network | business | 65,536 | 
| AS8643 | NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS | education | 51,712 | 
| AS200736 | MEDIANET INVEST AE | isp | 39,424 | 
| AS6744 | Computer Technology Institute and Press "Diophantus" | business | 32,768 |