List of the top 20 organizations with the largest IP allocations in Slovenia
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Telekom Slovenije, d.d. | 1,806,336 | 1.56 x 236 | 4 | 97 | |
| ARNES | 409,344 | 1.13 x 235 | 2 | 28 | |
| Telemach Slovenija d.o.o. | 350,464 | 1.56 x 236 | 1 | 41 | |
| 4 | A1 Slovenija telekomunikacijske storitve,d.d. | 333,568 | 0 | 3 | 23 |
| 5 | T-2, d.o.o. | 224,256 | 235 | 1 | 34 |
| 6 | SOFTNET d.o.o. | 108,800 | 1.13 x 237 | 1 | 86 |
| 7 | Republika Slovenija Ministrstvo za javno upravo | 70,912 | 235 | 1 | 7 |
| 8 | Univerza v Mariboru | 65,536 | 0 | 1 | 1 |
| 9 | Akton d.o.o. | 29,696 | 1.88 x 227 | 1 | 102 |
| 10 | Zavod Kabelska televizija Nova gorica | 29,696 | 232 | 1 | 5 |
| 11 | Webtasy, d.o.o. | 22,016 | 232 | 1 | 50 |
| 12 | PERFTECH, podjetje za proizvodnjo in uvajanje novih tehnologij, d.o.o. | 17,408 | 235 | 1 | 7 |
| 13 | University of Ljubljana, Faculty of Electrical Engineering | 16,640 | 232 | 1 | 3 |
| 14 | siaIT d.o.o. | 16,384 | 0 | 1 | 1 |
| 15 | MEGA M, d.o.o. | 16,384 | 232 | 1 | 3 |
| 16 | PHAETON PLUS d.o.o | 12,288 | 0 | 1 | 19 |
| 17 | Mobik d.o.o. | 12,288 | 232 | 1 | 3 |
| 18 | Velcom d.o.o | 10,240 | 232 | 1 | 7 |
| 19 | Telemach d.o.o. | 9,472 | 232 | 1 | 7 |
| 20 | XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana | 9,216 | 232 | 1 | 3 |