List of the top 20 organizations with the largest IP allocations in Austria
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| T-Mobile Austria GmbH | 2,904,064 | 1.99 x 236 | 1 | 160 | |
| A1 Telekom Austria AG | 2,836,224 | 1.26 x 237 | 3 | 124 | |
| Hutchison Drei Austria GmbH | 1,649,920 | 1.5 x 235 | 3 | 174 | |
| 4 | ACONET | 335,104 | 235 | 2 | 23 |
| 5 | LIWEST Kabelmedien GmbH | 254,976 | 232 | 1 | 10 |
| 6 | kabelplus GmbH | 245,504 | 1.25 x 234 | 2 | 32 |
| 7 | SALZBURG AG fur Energie, Verkehr und Telekommunikation | 242,176 | 1.13 x 235 | 1 | 38 |
| 8 | Technische Universitat Wien | 132,096 | 0 | 1 | 2 |
| 9 | Video-Broadcast GmbH | 121,856 | 232 | 1 | 24 |
| 10 | Vienna University Computer Center | 99,584 | 0 | 1 | 7 |
| 11 | APA-IT Informations Technologie G.m.b.H | 98,816 | 235 | 1 | 57 |
| 12 | Deutsche Telekom Global Business Solutions GmbH | 92,928 | 1.13 x 235 | 1 | 22 |
| 13 | Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH | 88,832 | 1.78 x 237 | 3 | 87 |
| 14 | Anexia Cloud Solutions GmbH | 87,296 | 1.01 x 232 | 2 | 434 |
| 15 | JM-DATA GmbH | 82,176 | 1.13 x 235 | 1 | 31 |
| 16 | eww ag | 81,664 | 1.25 x 235 | 3 | 34 |
| 17 | Magistrat der Stadt Wien, Magistratsabteilung 01 | 73,728 | 217 | 2 | 5 |
| 18 | CANCOM Austria AG | 69,120 | 235 | 3 | 11 |
| 19 | University Linz | 68,096 | 216 | 1 | 5 |
| 20 | Andritz AG | 66,560 | 1.25 x 218 | 1 | 5 |