| NOC | ||||
| 139.166.0.0 — 139.166.255.255 | National Oceanography Centre | United Kingdom | 139.166.0.0/16 | 65536 |
| 192.171.134.0 — 192.171.134.255 | National Oceanography Centre | United Kingdom | 192.171.134.0/24 | 256 |
| 192.171.135.0 — 192.171.135.255 | National Oceanography Centre | United Kingdom | 192.171.135.0/24 | 256 |
| 192.171.168.0 — 192.171.168.255 | National Oceanography Centre | United Kingdom | 192.171.168.0/24 | 256 |
| 192.171.196.0 — 192.171.196.255 | National Oceanography Centre | United Kingdom | 192.171.196.0/24 | 256 |
