| Date | IP Address |
| 2017-03-02 | 52.48.67.67 (ClassC) |
| 2018-08-22 | 52.30.159.173 (ClassC) |
| 2018-09-20 | 34.249.61.209 (ClassC) |
| 2019-04-10 | 63.35.128.55 (ClassC) |
| 2020-01-23 | 54.77.178.181 (ClassC) |
| 2023-10-16 | 52.17.109.209 (ClassC) |
| 2024-03-03 | 52.50.239.78 (ClassC) |
| 2024-05-19 | 34.251.203.176 (ClassC) |
| 2024-05-31 | 54.73.165.83 (ClassC) |
| 2025-01-09 | 3.255.48.233 (ClassC) |
| 2025-01-21 | 54.194.127.198 (ClassC) |
| 2025-01-28 | 52.215.95.29 (ClassC) |
| Date | Domain | IP |
| www.a-seikotsuin.com | 2024-09-30 | 52.215.95.29 |