| Date | IP Address |
| 2023-08-25 | 104.86.240.194 (ClassC) |
| 2023-10-24 | 23.196.205.10 (ClassC) |
| 2024-01-11 | 173.222.173.76 (ClassC) |
| 2024-03-26 | 23.64.109.99 (ClassC) |
| 2024-04-23 | 23.6.99.82 (ClassC) |
| 2024-07-24 | 23.43.186.213 (ClassC) |
| 2024-08-10 | 92.123.202.167 (ClassC) |
| 2024-11-05 | 23.198.144.137 (ClassC) |
| Date | Domain | IP |
| kaihatsu-kensa.kepco.jp | 2023-08-25 | 104.86.240.194 |
| hpc.kepco.jp | 2023-08-26 | 210.141.158.140 |
| kanriotasuke.kepco.jp | 2023-08-26 | 99.84.66.76 |
| api.kanriotasuke.kepco.jp | 2023-08-25 | 35.79.129.127 |
| sol.kepco.jp | 2024-11-06 | 52.155.117.143 |
| inquiryapplication.kepco.jp | 2024-03-10 | 3.163.24.67 |
| hpc-test.kepco.jp | 2023-08-26 | 210.141.158.141 |
| keiyaku.kepco.jp | 2023-08-25 | 104.86.240.194 |
| kaminari.biz.kepco.jp | 2024-03-10 | 3.163.24.67 |
| construction.biz.kepco.jp | 2024-02-25 | 18.161.6.37 |
| usageinquiry.biz.kepco.jp | 2024-03-10 | 204.246.191.112 |