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 | 14,470,032 | 244 | 4 | 1,386 | |
| SingTel Optus Pty Ltd | 10,653,216 | 1.25 x 233 | 23 | 752 | |
| Vodafone Australia Pty Ltd | 5,746,176 | 1.15 x 229 | 2 | 771 | |
| 4 | TPG Internet Pty Ltd | 5,154,360 | 1.1 x 234 | 11 | 7,099 |
| 5 | iiNet Limited | 3,313,664 | 1.81 x 234 | 6 | 727 |
| 6 | VOCUS PTY LTD | 3,194,880 | 1.21 x 235 | 21 | 956 |
| 7 | Australian Academic and Research Network | 2,497,632 | 1.03 x 240 | 11 | 256 |
| 8 | Iseek Communications Pty Ltd | 1,178,112 | 232 | 5 | 318 |
| 9 | AAPT Limited | 1,098,474 | 1.51 x 233 | 20 | 983 |
| 10 | Foxtel Management Pty Ltd | 908,544 | 1.25 x 231 | 3 | 205 |
| 11 | Exetel Pty Ltd | 640,512 | 1.04 x 232 | 1 | 492 |
| 12 | Commonwealth Scientific and Industrial Research Organisation | 603,904 | 1.02 x 233 | 2 | 42 |
| 13 | DATACOM SYSTEMS (AU) PTY LTD | 443,136 | 1.06 x 232 | 8 | 104 |
| 14 | Macquarie Corporate Telecommunications | 418,560 | 1.2 x 232 | 4 | 165 |
| 15 | Wideband Networks Pty Ltd | 370,688 | 1.22 x 233 | 1 | 578 |
| 16 | SUPERLOOP (AUSTRALIA) PTY LTD | 301,824 | 1.06 x 236 | 15 | 346 |
| 17 | Symbio Networks Pty Ltd | 273,192 | 0 | 1 | 155 |
| 18 | Monash University | 260,864 | 1.01 x 232 | 2 | 68 |
| 19 | CITEC | 242,432 | 232 | 1 | 61 |
| 20 | Verizon Australia Pty Limited | 208,640 | 232 | 1 | 42 |