| 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. | 667,392 | 1.25 x 235 | 1 | 45 | |
| Orange Slovensko a.s. | 359,936 | 236 | 1 | 23 | |
| 4 | SWAN, a.s. | 335,873 | 1.63 x 235 | 2 | 64 |
| 5 | Slovanet a.s. | 240,128 | 1.31 x 237 | 8 | 69 |
| 6 | ENERGOTEL a.s. | 54,272 | 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 | O2 Business Services, a.s | 43,520 | 235 | 1 | 12 |
| 10 | VNET a.s. | 36,608 | 1.5 x 235 | 1 | 40 |
| 11 | DataCentrum | 35,328 | 0 | 2 | 11 |
| 12 | SATRO s.r.o. | 21,504 | 232 | 1 | 5 |
| 13 | 1 Cloud Lab s.r.o. | 20,736 | 232 | 2 | 24 |
| 14 | DataNetworks s.r.o. | 18,944 | 232 | 1 | 18 |
| 15 | RUPKKI s.r.o. | 13,568 | 232 | 1 | 7 |
| 16 | Minet s.r.o. | 12,288 | 232 | 1 | 27 |
| 17 | WebSupport s.r.o. | 11,776 | 232 | 1 | 29 |
| 18 | KOREX networks, s.r.o. | 10,240 | 232 | 1 | 25 |
| 19 | LightStorm Services s.r.o. | 10,240 | 1.13 x 235 | 2 | 23 |
| 20 | ACS spol. s r. o. | 9,984 | 235 | 1 | 6 |