| Date | IP Address |
| 2018-06-05 | 52.197.176.8 (ClassC) |
| 2018-06-05 | 52.198.168.97 (ClassC) |
| 2018-07-03 | 52.194.71.143 (ClassC) |
| 2018-07-04 | 18.182.73.40 (ClassC) |
| 2019-10-12 | 52.199.132.126 (ClassC) |
| 2019-11-21 | 3.113.40.112 (ClassC) |
| 2020-07-21 | 13.35.183.3 (ClassC) |
| 2020-07-21 | 13.35.183.47 (ClassC) |
| 2020-08-24 | 13.226.14.106 (ClassC) |
| 2024-02-29 | 204.246.191.39 (ClassC) |
| 2024-08-26 | 3.163.24.69 (ClassC) |
| 2025-04-16 | 204.246.191.58 (ClassC) |
| 2025-04-25 | 204.246.191.74 (ClassC) |
| 2026-01-31 | 3.169.173.16 (ClassC) |
| Date | Domain | IP |
| www.seifuuen.or.jp | 2025-07-29 | 204.246.191.58 |