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. | 764,928 | 235 | 2 | 26 | |
| Zdruzenie pouzivatelov Slovenskej akademickej datovej siete | 558,592 | 232 | 1 | 15 | |
| SWAN, a.s. | 335,360 | 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. | 103,680 | 1.13 x 235 | 1 | 28 |
| 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. | 37,888 | 1.38 x 235 | 1 | 26 |
| 10 | O2 Business Services, a.s | 35,840 | 235 | 1 | 11 |
| 11 | DSI DATA, a. s. | 24,064 | 0 | 1 | 7 |
| 12 | SATRO s.r.o. | 21,504 | 232 | 1 | 5 |
| 13 | DataNetworks s.r.o. | 20,736 | 232 | 1 | 17 |
| 14 | LightStorm Communications s.r.o. | 13,568 | 233 | 1 | 6 |
| 15 | RUPKKI s.r.o. | 12,288 | 232 | 1 | 5 |
| 16 | Minet s.r.o. | 10,752 | 232 | 1 | 22 |
| 17 | Deutsche Telekom Pan-Net s.r.o. | 9,984 | 235 | 1 | 9 |
| 18 | ACS spol. s r. o. | 9,472 | 235 | 1 | 4 |
| 19 | E-MAX INTERNET & IT | 9,216 | 232 | 1 | 3 |
| 20 | PEGO Slovakia, s.r.o. | 9,216 | 0 | 1 | 2 |