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. | 1,806,592 | 1.56 x 236 | 4 | 99 | |
| A1 Slovenija telekomunikacijske storitve,d.d. | 440,320 | 1.56 x 236 | 2 | 28 | |
| ARNES | 374,528 | 1.13 x 235 | 2 | 19 | |
| 4 | Telemach UG d.o.o. | 336,640 | 1.56 x 236 | 1 | 39 |
| 5 | T-2, d.o.o. | 212,736 | 235 | 2 | 40 |
| 6 | Telemach d.o.o. | 124,416 | 233 | 6 | 13 |
| 7 | SOFTNET d.o.o. | 111,104 | 1.63 x 236 | 2 | 61 |
| 8 | Univerza v Mariboru | 67,072 | 232 | 1 | 6 |
| 9 | Ario, d.o.o. | 40,960 | 235 | 1 | 5 |
| 10 | Akton d.o.o. | 30,464 | 1.04 x 232 | 1 | 85 |
| 11 | Zavod Kabelska televizija Nova gorica | 28,672 | 232 | 1 | 4 |
| 12 | BBTEL, d.o.o. | 18,432 | 0 | 1 | 2 |
| 13 | PERFTECH, podjetje za proizvodnjo in uvajanje novih tehnologij, d.o.o. | 17,408 | 235 | 1 | 7 |
| 14 | University of Ljubljana, Faculty of Electrical Engineering | 16,640 | 232 | 1 | 3 |
| 15 | SGN d.o.o. | 16,384 | 233 | 1 | 4 |
| 16 | Mobik d.o.o. | 13,312 | 232 | 1 | 4 |
| 17 | XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana | 9,216 | 232 | 1 | 3 |
| 18 | Velcom d.o.o | 8,704 | 232 | 1 | 4 |
| 19 | DHH.si d.o.o. | 8,704 | 232 | 2 | 11 |
| 20 | Stelkom d.o.o. | 8,448 | 0 | 1 | 2 |