| Date | IP Address |
| 2022-02-02 | 52.76.60.80 (ClassC) |
| 2025-11-17 | 52.74.148.63 (ClassC) |
| 2025-11-26 | 13.228.204.202 (ClassC) |
| Date | Domain | IP |
| nishikomatsugawa.kurashi-study.net | 2024-11-24 | 35.75.111.69 |
| api-manager-staging.kurashi-study.net | 2025-11-17 | 52.74.148.63 |
| contents-manager-staging.kurashi-study.net | 2024-06-03 | 18.161.6.58 |
| contents-manager-development.kurashi-study.net | 2024-08-25 | 18.161.6.7 |