List of the top 20 organizations with the largest IP allocations in Slovakia
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Zdruzenie pouzivatelov Slovenskej akademickej datovej siete | 1,051,648 | 233 | 1 | 36 | |
| Slovak Telecom, a. s. | 668,416 | 1.25 x 235 | 1 | 42 | |
| Orange Slovensko a.s. | 360,192 | 236 | 1 | 24 | |
| 4 | SWAN, a.s. | 332,801 | 1.5 x 235 | 1 | 62 |
| 5 | Slovanet a.s. | 218,880 | 1.13 x 235 | 7 | 43 |
| 6 | ENERGOTEL a.s. | 58,880 | 1.13 x 235 | 1 | 21 |
| 7 | ANTIK Telecom s.r.o | 50,176 | 232 | 1 | 9 |
| 8 | DSI DATA, a. s. | 48,128 | 0 | 1 | 21 |
| 9 | RadioLAN spol. s r.o. | 43,008 | 1.13 x 235 | 1 | 30 |
| 10 | O2 Business Services, a.s | 39,936 | 235 | 1 | 13 |
| 11 | VNET a.s. | 38,656 | 1.5 x 235 | 1 | 41 |
| 12 | SATRO s.r.o. | 21,504 | 232 | 1 | 5 |
| 13 | DataNetworks s.r.o. | 19,712 | 232 | 1 | 15 |
| 14 | Minet s.r.o. | 12,032 | 232 | 1 | 26 |
| 15 | RUPKKI s.r.o. | 11,264 | 232 | 1 | 4 |
| 16 | LightStorm Services s.r.o. | 11,008 | 1.13 x 235 | 2 | 26 |
| 17 | KOREX networks, s.r.o. | 10,240 | 232 | 1 | 25 |
| 18 | eServer s.r.o. | 9,473 | 1.15 x 235 | 2 | 28 |
| 19 | Deutsche Telekom Pan-Net s.r.o. | 9,472 | 235 | 1 | 7 |
| 20 | ACS spol. s r. o. | 9,472 | 235 | 1 | 4 |