| 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 |
| meet.pen-online.jp | 2025-03-13 | 18.176.95.98 |
| www.pen-online.jp | 2023-11-01 | 54.92.43.225 |