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 | 14,781,184 | 244 | 4 | 1,579 | |
| SingTel Optus Pty Ltd | 11,310,924 | 1.5 x 232 | 23 | 1,287 | |
| TPG Internet Pty Ltd | 5,435,392 | 1.12 x 234 | 11 | 6,334 | |
| 4 | Vodafone Australia Pty Ltd | 5,041,664 | 1.95 x 229 | 2 | 1,166 |
| 5 | iiNet Limited | 3,129,858 | 1.81 x 234 | 6 | 689 |
| 6 | Australian Academic and Research Network | 2,492,672 | 1.03 x 240 | 11 | 280 |
| 7 | VOCUS PTY LTD | 2,125,825 | 1.03 x 235 | 21 | 575 |
| 8 | AAPT Limited | 1,140,480 | 1.51 x 233 | 19 | 554 |
| 9 | Foxtel Management Pty Ltd | 798,208 | 1.26 x 231 | 3 | 209 |
| 10 | Iseek Communications Pty Ltd | 646,144 | 232 | 5 | 267 |
| 11 | Exetel Pty Ltd | 640,000 | 1.04 x 232 | 1 | 497 |
| 12 | Commonwealth Scientific and Industrial Research Organisation | 596,480 | 1.03 x 232 | 2 | 40 |
| 13 | Macquarie Corporate Telecommunications | 418,560 | 1.2 x 232 | 4 | 169 |
| 14 | DATACOM SYSTEMS (AU) PTY LTD | 414,976 | 1.06 x 232 | 9 | 93 |
| 15 | Wideband Networks Pty Ltd | 371,200 | 1.38 x 232 | 2 | 506 |
| 16 | SUPERLOOP (AUSTRALIA) PTY LTD | 301,056 | 1.13 x 236 | 15 | 353 |
| 17 | Monash University | 260,864 | 1.01 x 232 | 2 | 69 |
| 18 | CITEC | 240,384 | 232 | 1 | 60 |
| 19 | Verizon Australia Pty Limited | 208,640 | 232 | 1 | 42 |
| 20 | Symbio Networks Pty Ltd | 193,640 | 0 | 1 | 49 |