List of the top 20 organizations with the largest IP allocations in Slovakia
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Slovak Telecom, a. s. | 665,088 | 235 | 2 | 19 | |
| Zdruzenie pouzivatelov Slovenskej akademickej datovej siete | 525,824 | 232 | 1 | 14 | |
| SWAN, a.s. | 333,569 | 1.5 x 235 | 4 | 64 | |
| 4 | Orange Slovensko a.s. | 247,552 | 236 | 1 | 20 |
| 5 | Slovanet a.s. | 216,576 | 1.13 x 235 | 7 | 34 |
| 6 | ENERGOTEL a.s. | 58,624 | 1.13 x 235 | 1 | 20 |
| 7 | ANTIK Telecom s.r.o | 50,176 | 232 | 1 | 9 |
| 8 | RadioLAN spol. s r.o. | 43,008 | 1.13 x 235 | 1 | 31 |
| 9 | VNET a.s. | 42,496 | 1.38 x 235 | 1 | 42 |
| 10 | O2 Business Services, a.s | 35,840 | 235 | 1 | 12 |
| 11 | DataCentrum | 34,304 | 0 | 2 | 7 |
| 12 | DSI DATA, a. s. | 24,064 | 0 | 1 | 7 |
| 13 | SATRO s.r.o. | 21,504 | 232 | 1 | 5 |
| 14 | DataNetworks s.r.o. | 19,712 | 232 | 1 | 15 |
| 15 | LightStorm Communications s.r.o. | 13,568 | 233 | 1 | 6 |
| 16 | RUPKKI s.r.o. | 12,288 | 232 | 1 | 5 |
| 17 | Minet s.r.o. | 11,264 | 232 | 1 | 24 |
| 18 | Deutsche Telekom Pan-Net s.r.o. | 9,984 | 235 | 1 | 9 |
| 19 | ACS spol. s r. o. | 9,472 | 235 | 1 | 4 |
| 20 | PEGO Slovakia, s.r.o. | 9,216 | 0 | 1 | 2 |