| Date | IP Address |
| 2016-01-05 | 52.192.171.42 (ClassC) |
| 2024-07-24 | 3.114.162.179 (ClassC) |
| 2024-08-10 | 13.115.175.126 (ClassC) |
| 2024-08-26 | 176.34.59.89 (ClassC) |
| 2024-11-07 | 18.180.175.11 (ClassC) |
| 2024-11-24 | 13.230.235.187 (ClassC) |
| 2025-02-01 | 52.196.188.65 (ClassC) |
| 2025-03-15 | 13.112.20.201 (ClassC) |
| 2025-04-21 | 13.114.42.24 (ClassC) |
| 2025-05-23 | 18.179.250.156 (ClassC) |
| 2025-06-03 | 3.113.159.249 (ClassC) |
| Date | Domain | IP |
| 062090.admin.covid19-vaccine.mrso.jp | 2025-03-07 | 52.192.110.46 |
| www.vaccine.mrso.jp | 2024-09-22 | 52.69.45.55 |
| admin.kenshin.mrso.jp | 2024-12-26 | 52.198.7.162 |
| www.mrso.jp | 2024-07-24 | 3.114.162.179 |