| Date | IP Address |
| 2018-12-27 | 52.196.45.161 (ClassC) |
| 2026-02-08 | 23.227.38.74 (ClassC) |
| Date | Domain | IP |
| ns2.shark.co.jp | 2025-10-05 | 95.101.36.66 |
| ns3.shark.co.jp | 2025-12-23 | 23.211.61.67 |
| ns4.shark.co.jp | 2025-09-08 | 95.100.173.64 |
| ns5.shark.co.jp | 2025-09-13 | 96.7.49.65 |
| ns6.shark.co.jp | 2026-02-08 | 23.61.199.66 |
| direct.shark.co.jp | 2026-02-08 | 23.227.38.74 |
| www.shark.co.jp | 2023-08-26 | 104.100.67.173 |