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 | 14,327,808 | 244 | 4 | 770 | |
| SingTel Optus Pty Ltd | 10,048,256 | 1.5 x 232 | 14 | 657 | |
| TPG Internet Pty Ltd | 5,516,800 | 1.85 x 233 | 3 | 6,461 | |
| 4 | Vodafone Australia Pty Ltd | 2,807,296 | 1.77 x 227 | 2 | 893 |
| 5 | iiNet Limited | 2,800,896 | 1.01 x 234 | 2 | 435 |
| 6 | Australian Academic and Research Network | 1,856,000 | 1.75 x 234 | 9 | 225 |
| 7 | VOCUS PTY LTD | 1,770,240 | 1.26 x 235 | 7 | 325 |
| 8 | AAPT Limited | 1,546,496 | 235 | 15 | 1,911 |
| 9 | Aussie Fibre Pty Ltd | 773,376 | 1.64 x 238 | 2 | 466 |
| 10 | Commonwealth Scientific and Industrial Research Organisation | 620,288 | 1.06 x 232 | 2 | 86 |
| 11 | SUPERLOOP (AUSTRALIA) PTY LTD | 606,720 | 1.25 x 236 | 3 | 251 |
| 12 | Symbio Networks Pty Ltd | 359,936 | 0 | 1 | 143 |
| 13 | Macquarie Technology Operations Pty Limited | 345,856 | 1.45 x 232 | 2 | 172 |
| 14 | Monash University | 267,264 | 1.01 x 232 | 2 | 72 |
| 15 | DATACOM SYSTEMS (AU) PTY LTD | 250,880 | 232 | 4 | 67 |
| 16 | CITEC | 242,176 | 232 | 1 | 66 |
| 17 | Australian Private Networks Pty Ltd | 236,800 | 0 | 1 | 37 |
| 18 | Verizon Australia Pty Limited | 206,336 | 232 | 1 | 35 |
| 19 | Department of the Prime Minister and Cabinet | 196,608 | 0 | 1 | 14 |
| 20 | GSL Networks Pty LTD | 166,144 | 1.04 x 237 | 2 | 1,733 |