List of the top 20 organizations with the largest IP allocations in Australia
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Telstra Limited | 14,374,400 | 244 | 4 | 867 | |
| SingTel Optus Pty Ltd | 9,942,528 | 1.5 x 232 | 15 | 726 | |
| TPG Internet Pty Ltd | 5,999,825 | 1.17 x 234 | 5 | 9,284 | |
| 4 | iiNet Limited | 3,006,464 | 1.51 x 234 | 5 | 540 |
| 5 | Vodafone Australia Pty Ltd | 2,749,440 | 1.9 x 227 | 2 | 1,061 |
| 6 | Australian Academic and Research Network | 1,864,704 | 1.75 x 234 | 8 | 672 |
| 7 | VOCUS PTY LTD | 1,731,840 | 1.26 x 235 | 7 | 309 |
| 8 | AAPT Limited | 1,074,707 | 1.5 x 233 | 12 | 2,338 |
| 9 | Wideband Networks Pty Ltd | 679,680 | 237 | 2 | 368 |
| 10 | SUPERLOOP (AUSTRALIA) PTY LTD | 629,250 | 1.19 x 236 | 4 | 302 |
| 11 | Commonwealth Scientific and Industrial Research Organisation | 620,288 | 1.06 x 232 | 2 | 86 |
| 12 | Symbio Networks Pty Ltd | 352,256 | 0 | 1 | 131 |
| 13 | Macquarie Technology Operations Pty Limited | 346,880 | 1.45 x 232 | 2 | 176 |
| 14 | Monash University | 269,312 | 1.01 x 232 | 2 | 78 |
| 15 | DATACOM SYSTEMS (AU) PTY LTD | 257,024 | 1.06 x 232 | 4 | 78 |
| 16 | CITEC | 241,920 | 232 | 1 | 65 |
| 17 | Australian Private Networks Pty Ltd | 236,800 | 0 | 1 | 37 |
| 18 | Verizon Australia Pty Limited | 207,104 | 232 | 1 | 38 |
| 19 | Department of the Prime Minister and Cabinet | 196,608 | 0 | 1 | 14 |
| 20 | ACT Government InTACT Group | 163,072 | 0 | 2 | 8 |