| Date | IP Address |
| 2023-11-01 | 54.92.43.225 (ClassC) |
| 2024-06-17 | 52.199.245.44 (ClassC) |
| 2024-07-24 | 13.230.114.59 (ClassC) |
| 2024-08-10 | 54.178.135.52 (ClassC) |
| 2024-10-10 | 54.178.55.240 (ClassC) |
| 2024-11-12 | 54.150.205.179 (ClassC) |
| 2024-11-24 | 54.238.183.11 (ClassC) |
| 2025-01-08 | 35.75.134.61 (ClassC) |
| Date | Domain | IP |
| static.pen-online.jp | 2024-07-07 | 52.219.163.103 |
| image.pen-online.jp | 2023-11-24 | 52.219.162.173 |
| special.pen-online.jp | 2024-06-29 | 204.246.191.97 |
| admin.pen-online.jp | 2024-11-24 | 3.112.155.63 |
| statics.pen-online.jp | 2024-02-19 | 52.219.12.53 |
| stage.statics.pen-online.jp | 2024-08-20 | 52.219.16.233 |
| www.pen-online.jp | 2023-11-01 | 54.92.43.225 |