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 | 3 | 98 | |
| ARNES | 407,040 | 1.13 x 235 | 2 | 19 | |
| Telemach UG d.o.o. | 346,624 | 1.06 x 237 | 1 | 43 | |
| 4 | A1 Slovenija telekomunikacijske storitve,d.d. | 328,960 | 1.06 x 236 | 3 | 22 |
| 5 | T-2, d.o.o. | 225,280 | 235 | 1 | 37 |
| 6 | SOFTNET d.o.o. | 100,096 | 1.06 x 237 | 2 | 80 |
| 7 | Republika Slovenija Ministrstvo za javno upravo | 70,656 | 235 | 1 | 6 |
| 8 | Univerza v Mariboru | 67,072 | 232 | 1 | 6 |
| 9 | Zavod Kabelska televizija Nova gorica | 29,696 | 232 | 1 | 5 |
| 10 | Akton d.o.o. | 28,416 | 1.05 x 232 | 1 | 90 |
| 11 | PERFTECH, podjetje za proizvodnjo in uvajanje novih tehnologij, d.o.o. | 17,408 | 235 | 1 | 7 |
| 12 | University of Ljubljana, Faculty of Electrical Engineering | 16,640 | 232 | 1 | 3 |
| 13 | siaIT d.o.o. | 16,384 | 0 | 1 | 1 |
| 14 | SGN d.o.o. | 16,384 | 232 | 1 | 3 |
| 15 | Mobik d.o.o. | 12,288 | 232 | 1 | 3 |
| 16 | Webtasy, d.o.o. | 10,496 | 232 | 1 | 5 |
| 17 | XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana | 9,216 | 232 | 1 | 3 |
| 18 | Velcom d.o.o | 8,960 | 232 | 1 | 5 |
| 19 | Telemach d.o.o. | 8,960 | 232 | 1 | 5 |
| 20 | Stelkom d.o.o. | 8,448 | 0 | 1 | 2 |