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 | 14,375,936 | 244 | 4 | 871 | |
| SingTel Optus Pty Ltd | 10,031,616 | 1.5 x 232 | 15 | 744 | |
| TPG Internet Pty Ltd | 6,026,150 | 1.17 x 234 | 5 | 10,976 | |
| 4 | iiNet Limited | 3,006,720 | 1.51 x 234 | 5 | 541 |
| 5 | Vodafone Australia Pty Ltd | 2,626,048 | 1.88 x 227 | 2 | 1,019 |
| 6 | Australian Academic and Research Network | 1,930,496 | 1.75 x 234 | 8 | 262 |
| 7 | VOCUS PTY LTD | 1,797,888 | 1.26 x 235 | 6 | 322 |
| 8 | AAPT Limited | 1,051,634 | 1.5 x 233 | 12 | 692 |
| 9 | SUPERLOOP (AUSTRALIA) PTY LTD | 622,338 | 1.19 x 236 | 4 | 303 |
| 10 | Commonwealth Scientific and Industrial Research Organisation | 591,872 | 1.88 x 227 | 2 | 42 |
| 11 | Wideband Networks Pty Ltd | 585,984 | 237 | 2 | 336 |
| 12 | Symbio Networks Pty Ltd | 351,232 | 0 | 1 | 128 |
| 13 | Macquarie Technology Operations Pty Limited | 346,624 | 1.45 x 232 | 2 | 175 |
| 14 | Monash University | 263,168 | 1.01 x 232 | 2 | 71 |
| 15 | DATACOM SYSTEMS (AU) PTY LTD | 257,536 | 1.06 x 232 | 5 | 80 |
| 16 | CITEC | 242,176 | 232 | 1 | 66 |
| 17 | Australian Private Networks Pty Ltd | 230,656 | 0 | 1 | 35 |
| 18 | Wireline | 206,592 | 1.75 x 234 | 1 | 222 |
| 19 | Verizon Australia Pty Limited | 206,336 | 232 | 1 | 35 |
| 20 | Department of the Prime Minister and Cabinet | 196,608 | 0 | 1 | 14 |