List of the top 20 organizations with the largest IP allocations in Switzerland
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Swisscom (Schweiz) AG | 8,241,408 | 1.99 x 238 | 3 | 426 | |
| Sunrise GmbH | 4,065,024 | 1.81 x 238 | 1 | 189 | |
| SWITCH | 2,184,960 | 1.31 x 237 | 1 | 125 | |
| 4 | RIPE Network Coordination Centre | 492,800 | 236 | 1 | 83 |
| 5 | CERN - European Organization for Nuclear Research | 354,816 | 233 | 1 | 22 |
| 6 | Migros-Genossenschafts-Bund | 330,496 | 0 | 1 | 13 |
| 7 | Quickline AG | 321,280 | 1.38 x 239 | 1 | 92 |
| 8 | VTX Services SA | 313,600 | 233 | 3 | 39 |
| 9 | Hoffmann - La Roche Ltd. | 202,752 | 1.04 x 233 | 1 | 32 |
| 10 | Swiss Federation represented by FOITT | 200,448 | 232 | 1 | 13 |
| 11 | Init7 (Switzerland) Ltd. | 178,688 | 1.75 x 236 | 2 | 83 |
| 12 | ABB Information Systems Ltd | 166,400 | 0 | 1 | 16 |
| 13 | Die Schweizerische Post AG | 165,888 | 1.5 x 233 | 1 | 7 |
| 14 | Zurich Insurance Company | 149,504 | 0 | 1 | 10 |
| 15 | Iway AG | 148,480 | 1.14 x 237 | 3 | 55 |
| 16 | ETAT DE GENEVE | 136,960 | 232 | 1 | 10 |
| 17 | netplus.ch SA | 135,168 | 1.25 x 235 | 1 | 39 |
| 18 | International Telecommunication Union | 131,584 | 216 | 1 | 6 |
| 19 | Centre Informatique Etat de Fribourg | 131,072 | 0 | 1 | 2 |
| 20 | Bank Julius Baer & Co. AG | 131,072 | 228 | 1 | 4 |