List of the top 20 organizations with the largest IP allocations in Iceland
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Ljosleidarinn ehf | 351,232 | 233 | 2 | 35 | |
| Mila hf | 141,056 | 235 | 1 | 14 | |
| Rannsokna- og haskolanet Islands hf. | 131,072 | 232 | 1 | 3 | |
| 4 | Advania Island ehf | 72,704 | 1.5 x 225 | 3 | 43 |
| 5 | Nova hf | 48,896 | 1.25 x 235 | 1 | 22 |
| 6 | Opin Kerfi hf | 22,272 | 1.06 x 236 | 4 | 21 |
| 7 | Hringdu ehf | 20,992 | 235 | 1 | 10 |
| 8 | Origo hf | 9,472 | 0 | 1 | 4 |
| 9 | Reykjavik City Hall | 9,216 | 0 | 1 | 3 |
| 10 | FlokiNET ehf | 8,960 | 1.5 x 218 | 1 | 39 |
| 11 | deCode Inc. | 8,192 | 0 | 1 | 1 |
| 12 | Hringidan ehf / Vortex Inc | 8,192 | 235 | 1 | 2 |
| 13 | Landsbankinn hf | 8,192 | 0 | 1 | 1 |
| 14 | Icelandic Ministry of Education | 8,192 | 0 | 1 | 1 |
| 15 | Eignafelag Tolvunar ehf | 8,192 | 0 | 1 | 1 |
| 16 | 1984 ehf | 5,632 | 232 | 1 | 6 |
| 17 | Sensa ehf | 5,376 | 1.13 x 235 | 2 | 8 |
| 18 | Snerpa ehf | 4,352 | 0 | 1 | 2 |
| 19 | Farice ehf | 4,352 | 232 | 2 | 8 |
| 20 | Arion Banki hf | 4,096 | 0 | 1 | 3 |