List of the top 20 organizations with the largest IP allocations in United Kingdom
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Virgin Media Limited | 26,921,816 | 1.01 x 239 | 3 | 325 | |
| British Telecommunications PLC | 19,314,688 | 1.13 x 242 | 5 | 630 | |
| Sky UK Limited | 7,860,480 | 1.5 x 235 | 1 | 44 | |
| 4 | Jisc Services Limited | 7,354,368 | 1.63 x 236 | 3 | 199 |
| 5 | Vodafone Limited | 2,081,280 | 1.13 x 235 | 5 | 22 |
| 6 | Daisy Corporate Services Trading Ltd | 750,593 | 1.13 x 236 | 1 | 115 |
| 7 | RM Education Ltd | 574,976 | 232 | 1 | 16 |
| 8 | IPXO UK LIMITED | 444,928 | 1.34 x 239 | 2 | 1,701 |
| 9 | Itility Limited | 149,760 | 235 | 1 | 17 |
| 10 | Six Degrees Technology Group Limited | 127,488 | 1.31 x 236 | 3 | 63 |
| 11 | TalkTalk Communications Limited | 108,032 | 232 | 2 | 17 |
| 12 | Voxility LLP | 97,280 | 1.19 x 220 | 1 | 275 |
| 13 | BBC | 82,176 | 233 | 1 | 7 |
| 14 | Sure (Guernsey) Limited | 76,544 | 1.25 x 235 | 1 | 68 |
| 15 | Luminet Data Limited | 73,984 | 233 | 1 | 24 |
| 16 | IX Reach Ltd | 63,492 | 1.5 x 233 | 2 | 44 |
| 17 | Lloyds Banking Group PLC | 56,832 | 0 | 1 | 36 |
| 18 | Sohonet Limited | 46,356 | 1.06 x 233 | 1 | 38 |
| 19 | Highland Network Ltd | 40,960 | 0 | 1 | 33 |
| 20 | Hydra Communications Ltd | 40,448 | 0 | 3 | 92 |