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 | 14,512,384 | 244 | 5 | 1,557 | |
| SingTel Optus Pty Ltd | 10,588,775 | 1.5 x 232 | 22 | 1,226 | |
| TPG Internet Pty Ltd | 5,411,328 | 1.13 x 234 | 11 | 6,405 | |
| 4 | Vodafone Australia Pty Ltd | 5,075,456 | 1.05 x 230 | 2 | 1,462 |
| 5 | iiNet Limited | 3,128,066 | 1.81 x 234 | 6 | 654 |
| 6 | Australian Academic and Research Network | 2,424,576 | 235 | 11 | 271 |
| 7 | VOCUS PTY LTD | 2,100,224 | 1.02 x 235 | 21 | 555 |
| 8 | AAPT Limited | 1,132,288 | 1.51 x 233 | 19 | 523 |
| 9 | Foxtel Management Pty Ltd | 806,400 | 1.26 x 231 | 3 | 213 |
| 10 | Exetel Pty Ltd | 671,744 | 1.04 x 232 | 1 | 495 |
| 11 | Commonwealth Scientific and Industrial Research Organisation | 596,480 | 1.03 x 232 | 2 | 40 |
| 12 | Iseek Communications Pty Ltd | 460,288 | 232 | 5 | 227 |
| 13 | Wideband Networks Pty Ltd | 375,392 | 1.09 x 236 | 2 | 514 |
| 14 | Macquarie Corporate Telecommunications | 355,328 | 1.2 x 232 | 4 | 174 |
| 15 | DATACOM SYSTEMS (AU) PTY LTD | 270,848 | 1.06 x 232 | 9 | 63 |
| 16 | Monash University | 260,864 | 1.01 x 232 | 2 | 69 |
| 17 | CITEC | 238,336 | 232 | 1 | 59 |
| 18 | SUPERLOOP (AUSTRALIA) PTY LTD | 225,792 | 1.13 x 236 | 15 | 288 |
| 19 | Verizon Australia Pty Limited | 209,152 | 232 | 1 | 43 |
| 20 | Symbio Networks Pty Ltd | 193,640 | 0 | 1 | 49 |