List of the top 20 organizations with the largest IP allocations in Iceland
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Syn hf | 336,640 | 233 | 1 | 34 | |
| Mila hf | 140,544 | 235 | 1 | 12 | |
| Rannsokna- og haskolanet Islands hf. | 131,072 | 232 | 1 | 3 | |
| 4 | Advania Island ehf | 70,400 | 1.5 x 225 | 3 | 37 |
| 5 | Nova hf | 48,384 | 1.13 x 235 | 2 | 20 |
| 6 | Hringdu ehf | 19,712 | 235 | 1 | 8 |
| 7 | Ljosleidarinn ehf | 16,384 | 0 | 1 | 1 |
| 8 | Opin Kerfi hf | 13,056 | 1.13 x 235 | 1 | 11 |
| 9 | deCode Inc. | 12,288 | 0 | 1 | 3 |
| 10 | Premis ehf | 11,264 | 0 | 2 | 8 |
| 11 | Reykjavik City Hall | 10,240 | 0 | 1 | 7 |
| 12 | Origo hf | 9,472 | 232 | 1 | 5 |
| 13 | Icelandic Ministry of Education | 8,192 | 0 | 1 | 1 |
| 14 | Eignafelag Tolvunar ehf | 8,192 | 0 | 1 | 1 |
| 15 | Landsbankinn hf | 8,192 | 0 | 1 | 1 |
| 16 | Hringidan ehf / Vortex Inc | 8,192 | 0 | 1 | 1 |
| 17 | Sensa ehf | 5,120 | 1.13 x 235 | 2 | 9 |
| 18 | Wintermute Technologies EHF | 5,120 | 0 | 1 | 14 |
| 19 | Snerpa ehf | 4,352 | 0 | 1 | 2 |
| 20 | Arion Banki hf | 4,096 | 0 | 1 | 3 |