List of the top 20 organizations with the largest IP allocations in Australia
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Telstra Corporation | 14,470,656 | 244 | 4 | 1,448 | |
| SingTel Optus Pty Ltd | 10,908,797 | 1.5 x 232 | 23 | 1,260 | |
| Vodafone Australia Pty Ltd | 5,369,344 | 1.94 x 229 | 2 | 1,164 | |
| 4 | TPG Internet Pty Ltd | 5,287,171 | 1.11 x 234 | 11 | 6,229 |
| 5 | iiNet Limited | 3,152,898 | 1.81 x 234 | 6 | 696 |
| 6 | VOCUS PTY LTD | 3,146,752 | 1.17 x 235 | 20 | 896 |
| 7 | Australian Academic and Research Network | 2,493,440 | 1.03 x 240 | 11 | 274 |
| 8 | AAPT Limited | 1,162,496 | 234 | 21 | 611 |
| 9 | Foxtel Management Pty Ltd | 802,048 | 1.26 x 231 | 3 | 213 |
| 10 | Iseek Communications Pty Ltd | 781,824 | 232 | 5 | 273 |
| 11 | Exetel Pty Ltd | 638,720 | 1.04 x 232 | 1 | 492 |
| 12 | Commonwealth Scientific and Industrial Research Organisation | 596,736 | 1.03 x 232 | 2 | 41 |
| 13 | Macquarie Corporate Telecommunications | 419,840 | 1.2 x 232 | 4 | 169 |
| 14 | DATACOM SYSTEMS (AU) PTY LTD | 417,024 | 1.06 x 232 | 9 | 101 |
| 15 | Wideband Networks Pty Ltd | 392,678 | 1.19 x 233 | 2 | 635 |
| 16 | Symbio Networks Pty Ltd | 309,064 | 0 | 1 | 170 |
| 17 | SUPERLOOP (AUSTRALIA) PTY LTD | 305,664 | 1.13 x 236 | 15 | 360 |
| 18 | Monash University | 260,864 | 1.01 x 232 | 2 | 69 |
| 19 | 255,488 | 1.75 x 234 | 44 | 225 | |
| 20 | CITEC | 240,384 | 232 | 1 | 60 |