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 | 14,375,168 | 244 | 4 | 867 | |
| SingTel Optus Pty Ltd | 9,931,264 | 1.5 x 232 | 15 | 655 | |
| TPG Internet Pty Ltd | 5,985,457 | 1.17 x 234 | 5 | 8,256 | |
| 4 | iiNet Limited | 3,006,464 | 1.51 x 234 | 5 | 540 |
| 5 | Vodafone Australia Pty Ltd | 2,982,912 | 1.9 x 227 | 2 | 1,078 |
| 6 | Australian Academic and Research Network | 1,854,208 | 1.75 x 234 | 8 | 645 |
| 7 | VOCUS PTY LTD | 1,731,072 | 1.26 x 235 | 7 | 307 |
| 8 | AAPT Limited | 1,091,379 | 1.5 x 233 | 11 | 3,972 |
| 9 | Wideband Networks Pty Ltd | 680,704 | 1.03 x 237 | 2 | 370 |
| 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 | 359,168 | 0 | 1 | 138 |
| 13 | Macquarie Technology Operations Pty Limited | 346,368 | 1.45 x 232 | 2 | 175 |
| 14 | Monash University | 267,264 | 1.01 x 232 | 2 | 77 |
| 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 |