| Date | IP Address |
| 2025-08-13 | 211.11.153.240 (ClassC) |
| Date | Domain | IP |
| sa1.penta-ocean.co.jp | 2025-08-13 | 211.11.153.230 |
| fg1.penta-ocean.co.jp | 2025-08-13 | 211.11.153.240 |
| sg1.penta-ocean.co.jp | 2025-05-24 | 219.127.238.122 |
| servicedesk.penta-ocean.co.jp | 2024-11-10 | 136.143.190.199 |
| www.penta-ocean.co.jp | 2025-05-27 | 165.100.6.162 |