| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Proximus NV | 6,420,736 | 1.25 x 238 | 4 | 10 | |
| Telenet BV | 2,291,200 | 1.01 x 240 | 1 | 92 | |
| Orange Belgium SA | 1,247,744 | 1.5 x 233 | 3 | 61 | |
| 4 | BELNET | 878,592 | 1.63 x 236 | 2 | 47 |
| 5 | VOO S.A. | 791,552 | 1.06 x 232 | 2 | 119 |
| 6 | Destiny N.V | 157,696 | 1.53 x 237 | 5 | 99 |
| 7 | EDPNET Belgium BV | 95,744 | 1.81 x 230 | 2 | 52 |
| 8 | Hermes Telecom BVBA | 86,016 | 1.19 x 236 | 2 | 19 |
| 9 | Combell NV | 85,760 | 1.75 x 235 | 1 | 75 |
| 10 | VERIXI SA | 83,456 | 233 | 1 | 48 |
| 11 | EUROCONTROL, the European Organisation for the Safety of Air Navigation | 72,448 | 0 | 1 | 25 |
| 12 | European Commission - Directorate General - Joint Research Centre | 69,632 | 0 | 1 | 2 |
| 13 | Agfa Gevaert NV | 65,536 | 0 | 1 | 1 |
| 14 | Council of the EU, General Secretariat | 53,760 | 0 | 1 | 5 |
| 15 | Easyhost BVBA | 39,168 | 232 | 1 | 5 |
| 16 | Cegeka NV | 36,096 | 1.01 x 225 | 2 | 29 |
| 17 | Citymesh Integrator NV | 34,816 | 235 | 2 | 19 |
| 18 | KBC GLOBAL SERVICES NV | 31,488 | 218 | 4 | 81 |
| 19 | Societe Internationale de Telecommunications Aeronautiques | 24,576 | 1.01 x 229 | 2 | 48 |
| 20 | Belgacom International Carrier Services SA | 23,040 | 232 | 1 | 23 |