List of the top 20 organizations with the largest IP allocations in European Union
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Akamai International B.V. | 18,972,240 | 1.01 x 240 | 8 | 4,166 | |
| WIND TRE S.P.A. | 8,315,648 | 1.02 x 241 | 1 | 140 | |
| KPN B.V. | 6,938,880 | 1.06 x 239 | 1 | 345 | |
| 4 | TELE2 | 4,968,448 | 1.08 x 239 | 1 | 239 |
| 5 | Elisa Oyj | 3,690,240 | 1.28 x 237 | 2 | 261 |
| 6 | Telia Finland Oyj | 3,637,504 | 1.5 x 235 | 1 | 199 |
| 7 | Renater | 2,866,944 | 1.38 x 232 | 46 | 207 |
| 8 | Consortium GARR | 2,771,200 | 233 | 1 | 84 |
| 9 | Universitaet Stuttgart | 2,714,880 | 1.56 x 236 | 1 | 101 |
| 10 | SWITCH | 2,253,568 | 1.59 x 237 | 1 | 126 |
| 11 | Easynet Global Services | 1,889,672 | 1.5 x 233 | 1 | 107 |
| 12 | Vodafone Group PLC | 1,412,864 | 243 | 1 | 275 |
| 13 | Forthnet | 1,257,984 | 1.71 x 235 | 1 | 79 |
| 14 | SONATEL-AS Autonomous System | 1,083,136 | 232 | 1 | 134 |
| 15 | Cable & Wireless Worldwide | 1,064,192 | 240 | 1 | 24 |
| 16 | KEMS Block-A, Floor 7, Souq Al-Kabeer Kuwait City, State of Kuwait P O Box 3623 | 803,840 | 1.5 x 21 | 1 | 201 |
| 17 | SUNET Swedish University Network | 619,200 | 232 | 1 | 56 |
| 18 | BT Communications Ireland Limited | 438,016 | 1.13 x 235 | 1 | 16 |
| 19 | Telia Company AB | 436,480 | 244 | 2 | 141 |
| 20 | Shell Information Technology International B.V. | 361,984 | 0 | 2 | 36 |